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SQUARING A 2-DIGIT NUMBER WHICH ENDS IN 5

*TRICKS*
**STEP 1**:Last two digits of the square are always 25.
**STEP 2**: To find the number which comes before 25, just perform the operation a x (a+1),where a
is the digit before 5 in the original number.
**STEP 3**. By putting the number received in step 2, just before 25 and you get your square.

**Example**: __Find the square of 75?__
If we want to square 75, we can find the same in the following steps –
**STEP 1**:1. Last two digits are 25.
**STEP 2**. The digit before 5 is 7, if we perform a x (a+1) operation on this,then we will be
7 x (7+1) = 56
**STEP3**. Hence the square of 75, will be 5625.
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