OTS Water & Sanitation Dept (WSSP / PHED): Mathematics MCQs with Answers

Question 1

If f(x) = 2x + 3, what is f(4)?

Accepted Answer

11

Answer

9

Answer

10

Answer

12

Question 2

The mean of a data set of 5 values is 10. The sum of squared deviations from the mean is 80. What is the variance?

Accepted Answer

16

Answer

20

Answer

14

Answer

18

Question 3

Which of the following numbers is prime?

Accepted Answer

17

Answer

9

Answer

15

Answer

21

Question 4

A number is divisible by 5 if it ends in which digit(s)?

Accepted Answer

0 or 5

Answer

2 or 4

Answer

1 or 3

Answer

4 or 6

Question 5

What is the LCM of 6, 8, and 12?

Accepted Answer

24

Answer

16

Answer

36

Answer

48

Question 6

What is the prime factorization of 36?

Accepted Answer

2² × 3²

Answer

2³ × 3

Answer

2 × 3³

Answer

2² × 3³

Question 7

Two numbers have an HCF of 4 and an LCM of 48. If one number is 16, what is the other number?

Accepted Answer

12

Answer

8

Answer

10

Answer

14

Question 8

Which of the following numbers is divisible by both 2 and 3?

Accepted Answer

18

Answer

14

Answer

22

Answer

26

Question 9

What is the LCM of 5 and 9?

Accepted Answer

45

Answer

14

Answer

40

Answer

50

Question 10

Three bells ring at intervals of 6, 8, and 12 minutes respectively. If they all ring together at 9:00 AM, at what time will they next ring together?

Accepted Answer

9:24 AM

Answer

9:16 AM

Answer

9:20 AM

Answer

9:18 AM

Question 11

The ratio of two numbers a and b is 3:5. If 2 is added to both the numbers, the ratio becomes 2:3. Find b?

Accepted Answer

10

Answer

15

Answer

8

Answer

5

Question 12

Complete the series 5, 9, 17, 33, ____

Accepted Answer

65

Answer

82

Answer

70

Answer

75

Question 13

The ratio of two numbers, a and b, is 3:5. If 2 is added to both numbers, the ratio becomes 2:3. What is the value of b?

Accepted Answer

10

Answer

8

Answer

15

Answer

5

Question 14

If a:b = 2:3 and b:c = 4:3, then find a:b:c.

Accepted Answer

8:12:09

Answer

2:03:08

Answer

2:03:09

Answer

2:03:12

Question 15

What is the LCM of the 6th and 7th term in a_n = 3n+2?

Accepted Answer

460

Answer

360

Answer

520

Answer

620