Squares and properties

Which of the following is a square of an even number?

• 144

• 169

• 441

• 625

Which of the following is not a perfect square?

• 841

• 529

• 198

• All of the above

How many numbers lie between 5^2 and 6^2

• 9

• 10

• 11

• 12

Which of the following will have 4 at the units place of its square?

• 14²

• 27²

• 62²

• 35²

A number ending with 9 will have the units place of its square as ..

• 3

• 9

• 1

• 6

Find square of $\frac{-2}{3}$  

•  $\frac{5}{8}$  

•  $\frac{1}{2}$  

•  $\frac{3}{6}$  

•  $\frac{4}{9}$  

The perfect square number between 20 and 30 is…

• 25

• 21

• 23

• 29

Why is 505050 not a perfect square?

• It has 5 in it.

• It has 6 digits

• It has 3 zeros in it.

• Its unit digit has odd number of zeros.

FORMULA : The sum of first ‘n’ number of odd natural numbers is n^2.

Using the above formula, what is the sum of…..

1+3+5+7+9+11+13

• 36

• 14

• 49

• 64

Formula: There are '2n' non square numbers between the squares of the consecutive numbers 'n' and '(n+1)'.
Using the above formula, how many numbers are there between the squares of 26 and 27? 

• 52

• 40

• 21

• 45