ALL STUDENT FORUM

Scam Alert

MATHEMATICS TRICK YOU CAN USE TO SOLVE PROBLEM WITHOUT CALCULATOR

Mathematics Trick You Can Use To Solve Problem Without Calculator...


Math can be terrifying for many people. This list will hopefully improve your general knowledge of mathematical tricks and your speed when you need to do math in your head.


1. The 11 Times Trick

We all know the trick when multiplying by ten - add 0 to the end of the number, but did you know there is an equally easy trick for multiplying a two digit number by 11? This is it:
Take the original number and imagine a space between the two digits (in this example we will use 52:

5_2

Now add the two numbers together and put them in the middle:

5_(5+2)_2

That is it - you have the answer: 572.

If the numbers in the middle add up to a 2 digit number, just insert the second number and add


1 to the first:

9_(9+9)_9

(9+1)_8_9

10_8_9

1089 - It works every time.


2. Quick Square

If you need to square a 2 digit number ending in 5, you can do so very easily with this trick. Mulitply the first digit by itself + 1, and put 25 on the end. That is all!

252 = (2x(2+1)) & 25

2 x 3 = 6

625


3. Multiply by 5

Most people memorize the 5 times tables very easily, but when you get in to larger numbers it gets more complex - or does it? This trick is super easy.

Take any number, then divide it by 2 (in other words, halve the number). If the result is whole, add a 0 at the end. If it is not, ignore the remainder and add a 5 at the end. It works everytime:

$2682 x 5 = (2682 / 2) & 5 or 0

2682 / 2 = 1341 (whole number so add 0)

13410

Let's try another:

5887 x 5

2943.5 (fractional number (ignore remainder, add 5)

29435

22189271


4. Multiply by 9

This one is simple - to multiple any number between 1 and 9 by 9 hold both hands in front of your face - drop the finger that corresponds to the number you are multiplying (for example 93 - drop your third finger) - count the fingers before the dropped finger (in the case of 93 it is 2) then count the numbers after (in this case 7) - the answer is 27.


5. Multiply by 4

This is a very simple trick which may appear obvious to some, but to others it is not. The trick is to simply multiply by two, then multiply by two again:

58 x 4 = (58 x 2) + (58 x 2) = (116) + (116) = 232


6. Calculate a Tip

If you need to leave a 15% tip, here is the easy way to do it. Work out 10% (divide the number by 10) - then add that number to half its value and you have your answer:

15% of $25 = (10% of 25) + ((10% of 25) / 2)

$2.50 + $1.25 = $3.75


7. Tough Multiplication

If you have a large number to multiply and one of the numbers is even, you can easily subdivide to get to the answer:

32 x 125, is the same as:

16 x 250 is the same as:

8 x 500 is the same as:

4 x 1000 = 4,000

1000-Abacus


8. Dividing by 5

Dividing a large number by five is actually very simple. All you do is multiply by 2 and move the
decimal point:

195 / 5

Step1: 195 * 2 = 390

Step2: Move the decimal: 39.0 or just 39

2978 / 5

step 1: 2978 * 2 = 5956

Step2: 595.6


9. Subtracting from 1,000

To subtract a large number from 1,000 you can use this basic rule: subtract all but the last number from 9, then subtract the last number from 10:

1000 -648

step1: subtract 6 from 9 = 3

step2: subtract 4 from 9 = 5

step3: subtract 8 from 10 = 2

answer: 352


10. Assorted Multiplication Rules

Multiply by 5: Multiply by 10 and divide by 2.

Multiply by 6: Sometimes multiplying by 3 and then 2 is easy.

Multiply by 9: Multiply by 10 and subtract the original number.

Multiply by 12: Multiply by 10 and add twice the original number.

Multiply by 13: Multiply by 3 and add 10 times original number.

Multiply by 14: Multiply by 7 and then multiply by 2

Multiply by 15: Multiply by 10 and add 5 times the original number, as above.

Multiply by 16: You can double four times, if you want to. Or you can multiply by 8 and then by 2.

Multiply by 17: Multiply by 7 and add 10 times original number.

Multiply by 18: Multiply by 20 and subtract twice the original number (which is obvious from the first step).

Multiply by 19: Multiply by 20 and subtract the original number.

Multiply by 24: Multiply by 8 and then multiply by 3.

Multiply by 27: Multiply by 30 and subtract 3 times the original number (which is obvious from the first step).

Multiply by 45: Multiply by 50 and subtract 5 times the original number (which is obvious from the first step).

Multiply by 90: Multiply by 9 (as above) and put a zero on the right.

Multiply by 98: Multiply by 100 and subtract twice the original number.

Multiply by 99: Multiply by 100 and subtract the original number.

Bonus: Percentages

Find 7 % of 300. Sound Difficult?

Percents: First of all you need to understand the word "Percent." The first part is PER , as in 10 tricks per listverse page. PER = FOR EACH. The second part of the word is CENT, as in 100. Like Century = 100 years. 100 CENTS in 1 dollar etc. Ok so PERCENT = For Each 100.

So, it follows that 7 PERCENT of 100, is 7. (7 for each hundred, of only 1 hundred).

8 % of 100 = 8. 35.73% of 100 = 35.73

But how is that useful??

Back to the 7% of 300 question. 7% of the first hundred is 7. 7% of 2nd hundred is also 7, and yep, 7% of the 3rd hundred is also 7. So 7+7+7 = 21.

If 8 % of 100 is 8, it follows that 8% of 50 is half of 8 , or 4.

Break down every number that's asked into questions of 100, if the number is less then 100, then move the decimal point accordingly.

EXAMPLES:

8%200 = ? 8 + 8 = 16.

8%250 = ? 8 + 8 + 4 = 20.

8%25 = 2.0 (Moving the decimal back).

15%300 = 15+15+15 =45.

15%350 = 15+15+15+7.5 = 52.5

Also it's usefull to know that you can always flip percents, like 3% of 100 is the same as 100% of 3.

35% of 8 is the same as 8% of 35


Source: http://listverse.com/2007/09/17/10-easy-arithmetic-tricks/

   (3154 Views)
Johnsonzeber
Buy ZAR BANKNOTES
we have best grade counterfeit money for sale, buy fake money online, fake dollars, fake pounds, fake euro, buy money online, fake money for sale, buy fake dollars, buy fake British pounds, buy fake euro, buy undetectable counterfeit money online, buy counterfeit money paper, buy counterfeit money dark web, buy counterfeit money that looks real, buy counterfeit money uk, buy counterfeit money Australia,
note we make.
buy counterfeit money united states, best counterfeit money, buy top grade counterfeit money online, high quality counterfeit money for sale, where to buy counterfeit money, how to buy counterfeit money, Buy ZAR BANKNOTES
South African Rand For Sale
South African Rand For Sale, We are the best and Unique producer of Super Undetectable Counterfeits and International DocumentationServices with over a billion of our products circulating around the world. We offer only original high-quality counterfeit currency NOTES. Buy South African Rand Counterfeit
We deliver worldwide.
right here is your threat to be a millionaire. Our cash is flawlessly reproduced, Indistinguishable to the attention and to touch.
we are sending in various sizes, packed and hidden. Buy ZAR BANKNOTES
Our notes are AAA grade excellent. Buy ZAR BANKNOTES
We sell AAA SSD Black money answer
-Holograms and Holographic Strips
Email(s): .....info@fastcounterfeitssdhome.com
My Wickr ID:...moneycontrol
WhatsApp:... 491639338173
WhatsApp... 4915213086893
https://www.fastcounterfeitssdhome.com/product/buy-zar-banknotes/
2023-01-27  10:58:19 pm Delete
Johnsonzeber
Buy THB %u2013 Thai Baht
Thailand Bath For sale, We are the best and Unique producer of Super Undetectable Counterfeit Banknotes and International Documentation Services with over a billion of our products circulating around the world. We offer only original high-quality counterfeit currency NOTES. Buy Thailand Bath Counterfeit Money
We ship worldwide.best quality counterfeit corrency online,buy fake baht online
We also print and sell Grade A banknotes of over 150 currencies in the world.
Here is your chance to be a millionaire. Our money is perfectly reproduced, Indistinguishable to the eye and to the touch.
We are sending in various sizes, packed and hidden. Buy THB %u2013 Thai Baht
All our notes carry all the holograms and water marks and passes the light detector test. We will deliver the money directly to your home without the interference of customs. we have a Huge quantity ready in stock.
Our notes are AAA grade Quality. South Korean Won For Sale
We sell AAA SSD Black Money Solution
-Holograms and Holographic Strips
-Micro-Lettering
-Metallic Ink and Thread
-Watermarks
-IR Detection
-Ultra-violet features
-See-through Features
-Different serial numbers
Thailand Bath For sale
Our banknotes contain security features that make them 100% undetectable and high quality fit for day to day use.
These security features include;
Email(s): .....info@fastcounterfeitssdhome.com
My Wickr ID:...moneycontrol
WhatsApp:... 491639338173
WhatsApp... 4915213086893
https://www.fastcounterfeitssdhome.com/product/buy-thb-thai-baht/
2023-01-27  10:59:01 pm Delete
Johnsonzeber
Buy CNY %u2013 Chinese Yuan Renminbi
Buy CNY 100 Online
We are the suppliers of the high quality fake Chinese yuan renminbi banknotes. Materials for the manufacture of these banknotes are durable and used in amounts measured or required. Both false and real documents can be purchased online and not easily identified with the guarantee. Our management expertise:
We sell fake licenses, visas, passports and other 100 % genuine documents. An individual buyer should be able to play these fake goods, fake money and even certificates safely. You can quickly get it home to defend yourself against consequences.
Buy fake 100 yuan and you will be pleased with the price because the polymer we use is a highly effective material used in fake banknotes.
Find the Best Source for Buy Cny 100 Yen Online:
We are one of the world's largest suppliers of counterfeit money to over millions of customers who are happy with our CNY 100 Yuan for sale online. Online at the lowest prices, we guarantee the highest quality fake money.
We are the number one manufacturer and fake currency retailer, from which you can buy CNY %u20AC100 online at the cheapest rates
How Do I Buy Renminbi Chinese Yuan Online?
note.
note we make. Our team is made up of Quality IT technicians from Morocco, US, Russia,
India, Korea and China etc We offer high quality counterfeit NOTES for all currencies.
Why would you buy from us?
Email(s): .....info@fastcounterfeitssdhome.com
My Wickr ID:...moneycontrol
WhatsApp:... 491639338173
WhatsApp... 4915213086893
https://www.fastcounterfeitssdhome.com/product/buy-cny-chinese-yuan-renminbi/
2023-01-27  10:59:43 pm Delete
Johnsonzeber
Buy Counterfeit Singapore dollar
We are the best and Unique producer of High quality Undetectable counterfeit Banknotes. With over a billion of our products circulating around the world. We offer only original high-quality counterfeit currency NOTES.
We have the best HOLOGRAMS AND DUPLICATING MACHINES
With over 13million of our products circulating over the world.
We offer only original high-quality counterfeit currency NOTES.
We ship worldwide. We also print and sell Grade A banknotes of over 150 currencies in the world. Here is your chance to be a millionaire.
Our money is perfectly reproduced, Indistinguishable to the eye and to touch.
We are sending in various sizes, packed and hidden. All our notes carries all the holograms and water marks and passes the light detector test.All notes have been approved, and can pass 95% of all tests and can pass all simple tests such as the pen test and UV tests with a 100% success rate.
We will deliver the money directly to your home without the interference of customs . we have a Huge quantity ready in stock. EUROS, DOLLARS AND POUNDS AND NOVELTY DOCUMENTS LIKE PASSPORTS, ID CARDS, GREEN CARDS AND DRIVERS LICENSE.
FACE TO FACE MEETING LIVE INSPECTION OF PRODUCTS IS ALLOWED BEFORE PAYMENT IS MADE.
Get your bills now!

Email(s): .....info@fastcounterfeitssdhome.com
My Wickr ID:...moneycontrol
WhatsApp:... 491639338173
WhatsApp... 4915213086893
https://www.fastcounterfeitssdhome.com/product/buy-counterfeit-singapore-dollar/
2023-01-27  11:01:59 pm Delete
Johnsonzeber
Buy counterfeit money from Korea
One stop premium solution to buy 100% high quality undetectable counterfeit money for sale like South Korean won , other currencies also available for sale. We%u2019re leading distributor & suppliers of top grade fake counterfeit money online.
Accessible Currencies
We print and move Grade A banknotes of more than 150 monetary forms on the planet. We don%u2019t move fake or phony cash however we offer you genuine cash printed from unique negatives from the world Bank.
Acknowledged Payments
We additionally acknowledge US Amazon Gift card code. When we get your request, we will forward to you the location where you will make the installment.
The South Korean won or Korean Republic won is the official currency of South Korea.
BUY COUNTERFEIT MONEY TO AVOID BEING HARD ON YOURSELF
Buy South Korean Won counterfeit money, We all make mistakes that wreak havoc on our finances. That is human nature anyone can%u2019t get away from. We bet you%u2019ve also overspent on shoes or unnecessary stuff at least once. So, how not to end up being short for money and taking out loans with ridiculously high-interest rates? There is only one thing you can do for sure %u2013 buy currency online instead of sweeping your budget problems under the rug.
Neglecting financial hardships or freaking out because of them are two extremes you should stay away from. They won%u2019t save your money, but when yourwallet is full of first-classfake banknotes, you can admit your weaknesses and indulge yourself in everything you want. Thus, you will never fret about being hard up for cash. And High-Quality Currencies and Documents will gladly assist you with that.
Email(s): .....info@fastcounterfeitssdhome.com
My Wickr ID:...moneycontrol
WhatsApp:... 491639338173
WhatsApp... 4915213086893
https://www.fastcounterfeitssdhome.com/product/buy-south-korean-won/
2023-01-27  11:02:25 pm Delete
Johnsonzeber
Buy Indian Rupees
Indian Rupee
Fake Money Online undetectable counterfeit money Fake Counterfeit Money Buy counterfeit Indian Rupee online Buy Indian Rupee online Buy Fake Indian Rupee online Best Undetectable Currency
You are looking to buy Indian Rupee online? you are in the right place, is the best suppliers of fake money for sale, counterfeit money for sale, with many branches located. In the USA, Europe, Africa, and Australia. We have been doing this business for a long period of time so we have a lot of experience.
Buy Real Counterfeit Indian Rupee.Counterfeitcash is imitation currency created while not the legal sanction of the state or government. sometimes during a deliberate commit to imitating thatcurrencyso on deceive its recipient.
Counterfeiting is as previous as cash itself and is sufficiently current throughout history that it%u2019s been referred to as %u201Cthe world%u2019s second-oldest profession
Our Guarantee :
So We offer a 100% Satisfaction Guarantee on all sales. Then If you are not happy with your Fake Indian Rupee for any reason. Please contact us within 7 days of receiving your item. We will happily work with you to find a solution to any problem.
also, Our delivery is 100% Guarantee and we do discreet packaging
We want your experience to be a good one. As you can tell from our feedback, almost every customer is a happy one
Then Our goal is always a satisfied customer.
before leaving negative feedback, please contact us so we can help make it right
Read Before order :
before order our Counterfeit money please select the amount you want to purchase and select the denominations
feel free to contact us on our contact page:https://fastcounterfeitssdhome.com
Email(s): .....info@fastcounterfeitssdhome.com
My Wickr ID:...moneycontrol
WhatsApp:... 491639338173
WhatsApp... 4915213086893
https://www.fastcounterfeitssdhome.com/product/buy-kuwaiti-dinar/
2023-01-27  11:02:48 pm Delete
Jeff99
Buy Counterfeit Money Online

WhatsApp: ( 49 163 6583627)
General Support: ( mystuffcarl@gmail.com )
Telegram: ( Bestcargoo )


We are the best and Unique producer of HIGH QUALITY Undetectable counterfeit Banknotes. With over a billion of our products circulating the world. We offer only original high-quality counterfeit currency NOTES. We ship worldwide. We also print and sell Grade A banknotes of over 50 currencies in the world. Here is your chance to be a millionaire. Our
money is perfectly reproduced, Indistinguishable to the eye and the touch. We are sending in various sizes, packed and hidden. All our notes carry all the holograms and water marks and pass the light detector test. We will deliver the money directly to your home without the interference of customs. we have a Huge quantity ready in stock.
EUROS, DOLLARS AND POUNDS, AND NOVELTY DOCUMENTS LIKE PASSPORTS, ID CARDS, GREEN CARDS AND


Why would you buy from us?
Our banknotes contain the following security features that make
it to be genius and we have the best grade counterfeit in the world both Euro and Dollar

Any Country currency:
Security features of our bank notes are below :
Intaglio printing
Watermarks
Security thread
See-through register
Special foil/special foil elements
Iridescent stripe / shifting colors.


WHERE CAN YOU SPEND THE MONEY?
PAY YOUR DEBT, EXCHANGE, ATMS, MC DONALD'S , SHOPS, RESTAURANTS , SUPERMARKETS, PETROL SHOPS, GAME HALL, BANKS, SHOPPING MALLS, GAMES A, ND CASINO. ATTRACTION PARKS, ELECTRONIC SHOPS , TAXI, METRO AND TRAIN STATIONS, USED TO PAY BUS AND ANY TRANSPORTATION CAN BE USED IN THE SUPPER MARKET.

USED FOR OTHER PERSONAL PURPOSES AND EVERYWHERE...

Our banknotes are printed on 80% cotton and 20% cellulose paper which differs substantially
from normal paper. By using a special printing technique, several picture elements on the
front of the banknote are identifiable by touch. The guidelines on detecting counterfeit
currency give a comparison of genuine and falsified security features.

- Our bills/notes bypass everything, counterfeit pens, and machines.
- Can be used in banks but can be used elsewhere same like normal money
- We have the best HOLOGRAMS AND DUPLICATING MACHINES
- UV: YES
-SSD Solution for sale to clean stain and black notes.

EUR - Euro
USD - US Dollar
DNR - DINA
2023-02-01  01:18:29 am Delete
Jeff99
Buy Counterfeit Money Online

WhatsApp: ( 49 163 6583627)
General Support: ( mystuffcarl@gmail.com )
Telegram: ( Bestcargoo )


We are the best and Unique producer of HIGH QUALITY Undetectable counterfeit Banknotes. With over a billion of our products circulating the world. We offer only original high-quality counterfeit currency NOTES. We ship worldwide. We also print and sell Grade A banknotes of over 50 currencies in the world. Here is your chance to be a millionaire. Our
money is perfectly reproduced, Indistinguishable to the eye and the touch. We are sending in various sizes, packed and hidden. All our notes carry all the holograms and water marks and pass the light detector test. We will deliver the money directly to your home without the interference of customs. we have a Huge quantity ready in stock.
EUROS, DOLLARS AND POUNDS, AND NOVELTY DOCUMENTS LIKE PASSPORTS, ID CARDS, GREEN CARDS AND


Why would you buy from us?
Our banknotes contain the following security features that make
it to be genius and we have the best grade counterfeit in the world both Euro and Dollar

Any Country currency:
Security features of our bank notes are below :
Intaglio printing
Watermarks
Security thread
See-through register
Special foil/special foil elements
Iridescent stripe / shifting colors.


WHERE CAN YOU SPEND THE MONEY?
PAY YOUR DEBT, EXCHANGE, ATMS, MC DONALD'S , SHOPS, RESTAURANTS , SUPERMARKETS, PETROL SHOPS, GAME HALL, BANKS, SHOPPING MALLS, GAMES A, ND CASINO. ATTRACTION PARKS, ELECTRONIC SHOPS , TAXI, METRO AND TRAIN STATIONS, USED TO PAY BUS AND ANY TRANSPORTATION CAN BE USED IN THE SUPPER MARKET.

USED FOR OTHER PERSONAL PURPOSES AND EVERYWHERE...

Our banknotes are printed on 80% cotton and 20% cellulose paper which differs substantially
from normal paper. By using a special printing technique, several picture elements on the
front of the banknote are identifiable by touch. The guidelines on detecting counterfeit
currency give a comparison of genuine and falsified security features.

- Our bills/notes bypass everything, counterfeit pens, and machines.
- Can be used in banks but can be used elsewhere same like normal money
- We have the best HOLOGRAMS AND DUPLICATING MACHINES
- UV: YES
-SSD Solution for sale to clean stain and black notes.

EUR - Euro
USD - US Dollar
DNR - DINA
2023-02-01  01:19:49 am Delete