Shortcut to square any number from 20 to 29 is an easy way to mentally square any number from 20 to 29. Knowing this trick can of great help especially when squaring a number forms part of a bigger question.

Below are the steps to find square of any number from 20 to 29 in seconds.

**Step 1:**First add the given number and the unit’s digit.

**Step 2:**Double the result obtained in step 1.

**Step 3:**Square the unit’s digit of the number given in question and place it next to the result obtained in step 2.

**Examples**

**Example 1:**Find the square of 22 in 5 seconds

22²=?

**Step 1:**Here the unit’s place digit is 2. Adding unit digit to the given number

**we get,**22 + 2=24

**Step 2:**Doubling the result in step1

we get, 24×2=48_

**Step 3:**Squaring the unit’ place digit

we get,2

^{2}=4Now put the result obtained in step 3 in step 2,we get

**22²=484**

**Ans:484 **

**Example 2:**Find the square of 28 in 5 seconds.

28²=?

**Step 1:**Here the unit’s place digit is 8. Adding unit digit to the given number

we get,28+8=36

**Step 2:**Doubling the result in step1

we get, 36×2=72_

**Step 3:**Squaring the unit’ place digit

we get, 8

^{2}= 64Put the result obtained in step 2,Now carry forward ten’s place digit(6) to step 2 .

**Step 4:**Add carry forward from step 3 to result obtained in step 2

we get, 72+6=78

Put the unit’s place digit(4) the derived from step 3 next to result obtained in step 4.

we get, 784

28²=784

**Ans:784**

**Example 3:**Find the square of 23 in 5 seconds

23²=?

**Step 1:**Here the unit’s place digit is 3. Adding unit digit to the given number

**we get,**23 +3=26

**Step 2:**Doubling the result in step1

we get, 26×2=52_

**Step 3:**Squaring the unit’ place digit

we get,3

^{2}=9Now put the result obtained in step 3 in step 2,we get

**23²=529**

**Ans:529
**