Core Mathematics

Question 1

1Solve 4x + 8 = 2x + 28.

Medium

A. x = 20 B. x = 10 C. x = −10 D. x = 11

Question 2

2In solving an equation, you must do the same operation to both sides.

Easy

A. True B. False

Question 3

3Solve 5x + 9 = 3x − 1.

Medium

A. x = −4 B. x = −10 C. x = −5 D. x = 5

Question 4

4When 5 times a number is increased by 15, the result is 60. Find the number.

Easy

A. 8 B. 12 C. 24 D. 9

Question 5

5When 2 times a number is increased by 7, the result is 31. Find the number.

Easy

A. 11 B. 12 C. 19 D. 15.5

Question 6

6When 2 times a number is increased by 7, the result is 51. Find the number.

Easy

A. 25.5 B. 22 C. 21 D. 29

Question 7

7The perimeter of a rectangle is 40 cm and its length is 12 cm. Its width is

Easy

A. 8 cm B. 10 cm C. 16 cm D. 28 cm

Question 8

8When 3 times a number is increased by 3, the result is 114. Find the number.

Easy

A. 40 B. 38 C. 37 D. 36

Question 9

9Solve (x + 3)/3 = 2. x = ___

Medium

Your answer (fill in the blank)

Question 10

10x = 4 satisfies 3x − 5 = 7.

Easy

A. True B. False