Question

without doing any calculation find the numbers which are surely perfect square.estimate it's sqaure root?​

Answer 1

Answer:

4 9 16 25 36 49 64 81 100

2 3 4. 5. 6. 7. 8. 9. 10

Answer 2

Step-by-step explanation:

There are many ways in which we can find our perfect and with don't calculation, like:

1. Numbers ending in 2,3,7 and 8 numbers ending in digits are never perfect squares.

2. A number ending in odd number of zeros is never a perfect square.

3. A number ending in even number of zeros may be a perfect square. Example:400 is a perfect square but 500 is not.

4. Squares of even numbers are always even.

5. Squares of our numbers are always odd.

There is no short cut to calculate square roots, you can to memorize it.