Mental Math

1. What should be added to -5/4 to get -1?

• -1/4

• 1/4

• 1

• -3/4

Find the area of cricle whose diameter is 14 cm ?

• 14

• 44

• 7

• 21

Number of edges dose a cube have:

• 8

• 14

• 12

• 6

The solution of 2x-3=7 is:

• 5

• 7

• 12

• 11

5x+6y is a :

• Monomial

• Binomial

• Trinomial

• Nome of the above

The usual form of 100×7+10×1+8 is :

• 108

• 708

• 718

• 170

An integer can be :

• Only positive

• Only negative

• Both positive and negative

• None of the above

Which of the following is not a regular polygon?

• Square

• Equilateral triangle

• Rectangle

• Regular hexagon

The ones digit of the cube of 53 is :

• 9

• 3

• 7

• 1

The width or size of the class interval 30-40 is :

• 10

• 30

• 40

• 70