Maths Tricks

## Square Root of Imperfect Square

Hey here i am going to share a trick on finding out square root of imperfect squares. First of all we should now what are imperfect squares.

Imperfect squares are the number whose square root are not integers like 2,3 etc whereas number like 4,9,16,25 are perfect square because there square roots are 2,3,4,5 respectively.

## Method

So lets look at the simplest method that can be applied for finding square root of imperfect squares. You only need to remember following formula.

x±y = √x ± y/2√x

Lets understand above formula of finding square root using some example

Example: √17

First Split 17 such that you can find the nearest perfect square in our case we can split it us follows

16+1So here comparing with formula x=16 and y=1 putting it in formula we get

16 + 1/2√16

On simplifying we will get it as 4+1/(2*4)

that can be written as 4+1/8 ie., 4+0.125 = 4.125

Hence Sqrt of 17 comes out to be 4.125(approx)

These is more easier method as compared to traditional long division method of finding square root of imperfect squares. So give it a try and if you find out any problem the please comment below.

For tricks on finding square click here..!!

Maths Tricks

## Age Guessing

Below is a trick to guess age of any body just by asking them to do some simple arithmetic calculations for you. This can be used to amaze your friends.

Lets understand these trick with an example

Suppose age of your friend is 37 and you don’t know that.

Step 1: Tell friend to multiply his age by 5 i.e., 37*5 = 185

Step 2: tell him/her to add 8 to the result i.e., 185+8 = 193

Step 3: tell him/her to multiply the result by 2 i.e., 193*2 = 386

Step 4: tell him/her to subtract 6 from the result i.e., 386-6 = 380

Step 5: tell him/her to multiply the result by 10 i.e., 380*10 = 3800

Step 6: tell him/her to subtract 100 from the result i.e., 3800-100 = 3700

Step 7: ask him/her to tell you the result i.e., 3700

Step 8 : now you divide the result by 100 i.e., 3700/100 = 37 which is your friend’s age.

lets take one more example if you think it is a bluff take 15

Step 1: Tell friend to multiply his age by 5 i.e., 15*5 = 75

Step 2: Tell him/her to add 8 to the result i.e., 75+8 = 83

Step 3: tell him/her to multiply the result by 2 i.e., 83*2 = 166

Step 4: tell him/her to subtract 6 from the result i.e., 166-6=160

Step 5: tell him/her to multiply the result by 10 i.e., 160*10 = 1600

Step 6: tell him/her to subtract 100 from the result i.e., 1600-100 = 1500

Step 7: ask him/her to tell you the result i.e., 1500

Step 8: now you divide the result by 100 i.e., 1500/100 = 15 which is your friend’s age.

Comment below in case you find any problem in this trick.