Question

how to know that the number is a perfect square Or not answer pls​

Answer 1

Answer:

What is the quickest way to determine if a number is a perfect square?

I am not a mathematician, so i'll give you the laymen answer to this question.

If you notice, all perfect squares end with either of the following digits.

0,1,4,5,6,9.

For example, sq. of 18 = 324, sq. of 23 = 529 and so on.

After checking the last digit, we will check the 2nd last/ preceding digit.

LAST DIGIT. PRECEDING DIGIT

0. 0

1. 0 or even digits

4. 0 or even digits

5. 2

6. Odd digit

9. 0 or even digits

Also if you come across with a number which fulfils both the above conditions, then check for the final condition.

If you notice, sum of the digits of a perfect square number will always be either of the following digits.

1,4,7 or 9

For example,

sq. of 18 = 324,

3+2+4 = 9

sq. of 23 = 529,

5+2+9=16

1+6= 7 and so on.

I hope this helps.

P.S.- it does not cover all the aspects of the perfect square but it works for me almost 99% of the time

Answer 2

Answer:

1. Take the square root of the number.
2. Multiply the square root twice.
3. Use boolean equal operator to verify if the product of square root is equal to the number given.