4 Awesome Math Tricks You Didn’t Know Existed


No matter how much you hate it but the importance of mathematics in every day life can never be ignored. Math is all around us, in everything we do. It is the building block for everything in our daily lives which includes mobile devices, engineering, architecture, money, art and even sports.

When I was a student, I loved studying mathematics, while some of my friends really hated it. Math is all about understanding the concept of a formula and applying it in order to solve a problem and get an appropriate answer.  I was easily able to grasp the concept of formulas, while my friends struggled badly. Instead of understanding, they tried learning all sorts of formulas by heart, which in mathematics is not right.

However, apart from using standard formulas to solve equations, there are several other cool mathematics tricks which people never know about. Here are some of the coolest tricks you can use and share with your friends:


1)    Multiplying by 4

This trick is very simple and yet logical. To multiply any number by 4, just multiply it by 2 and then double the answer. The basic concept of this trick is that you can solve a multiplication problem by multiplying by its factors. Let’s assume the number is 25.


25 x 4

25 x 2 = 50

50 x 2 = 100

25 x 4 = 100

This trick is based on a very simple fact:

2 x 2 = 4


25 x 4 = 25 x (2 x 2)

=>25 x 2 x 2

=>50 x 2

= 100


2)    Hate 8 (Eight)

Yep, you read it right. This lovely mathematical trick is known as hateful eight. I am sure you will love it like I did. Grab a calculator and read on:

Ask your friend to choose a number between 1 and 9, but he is not allowed to choose the number 8.

For example: 5

Now, multiply the number by 9:

5  x  9   =  45

Multiply the answer by 12345679 (Please note that number 8 should not be included in the multiplication)


45  x  12345679  =  Magic!

The answer that you will get is 55555555. That is 8 times number 5.

Try another number!


3)    Pick a Number and Know Your Age

I don’t know but this trick gives me a great feeling of happiness and excitement. Try it with your friends. I am sure they will like it too.

First, pick a number between 2 and 9

I pick: 5

Next, multiply this number by 2

5  x  2  =  10

Add 5 to the answer:

10  +  5  =  15

Now multiply this number by 50:

15  x  50  =  750

Now, here comes the tricky part.

If you have already celebrated your birthday this year then, add 1764.

If you haven’t yet celebrated your birthday this year then, add 1763.

In my case I have already celebrated my birthday this year, so:

750  +  1764  =  2514

The last step is to subtract your year of birth:

2514  –1985  =  529

The answer you get is magical. Here’s how:

The first number represents the number that you picked, i.e. 5

The last two numbers represents your age, i.e. 29

See, this is called a classic mathematical trick. Try it!


4)    Result  1 , 2 , 4 , 5 , 7 , 8

I don’t have any specific name for this trick. Anyway, here it goes:

First pick a number between 1 and 6

For example: 2

Multiply the number by 9:

2  x  9  =  18

Multiply the result with 111:

18  x  111  =  1998

Multiply the result with 1001:

1998  x  1001  =  1999998

In last step divide the result by 7:

1999998  /  7  =  285714

The answer has all the above numbers present, i.e. 1 , 2 , 4 , 5 , 7 , 8.


With a little practice and preparation, you can memorize these mathematical tricks easily and show them to your friends and family just for fun.

Employed as a Board of Advisors at Assignment Plus, Miley Adalson offers help to need learners who wonder, “who can do my assignment”. She also runs a blog that talks about fresh grads, freshman career, etc.

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Vineet Patawari

Hi, I'm Vineet Patawari. I fell in love with numbers after being scared of them for quite some time. Now, I'm here to make you feel comfortable with numbers and help you get rid of Math Phobia!

12 thoughts to “4 Awesome Math Tricks You Didn’t Know Existed”

  1. When I checked the calculation of 45*12345679 I got 555,555,555. 5 is repeated 9 times.But you have given as 8 times.

  2. First method ( age calculation) did not work . Mine date of birth is 1 jan 1953
    2514-1953 =61 Where as i have already completed 62 years and going in 63 rd

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