Mathematics Practice Questions

Which of the following numbers is not a perfect square?

• 64

• 81

• 100

• 120

• 121

Find the LCM of 30, 45, 60 and 90.

• 3

• 5

• 60

• 180

• 360

• 4

• 6

• 12

• 24

• 48

• 0.34

• 0.43

• 0.47

• 0.65

• 0.75

• 2/3

• 13/15

• 16/25

• 6/7

• 23/35

• 50

• 25

• 20

• 5

• 0

• −1/5

• 1/20

• 1/2

• 3/5

• 5/4

If 7 is added to a certain number and the result is 42, what is the number?

• 42

• 35

• 21

• 12

• 6