Mathematics questions and answers

Mathematics Questions and Answers

How good are you with figures and formulas? Find out with these Mathematics past questions and answers. This Test is useful for both job aptitude test candidates and students preparing for JAMB, WAEC, NECO or Post UTME.

351.

Evaluate and correct to two decimal places, 75.0785 - 34.624 + 9.83 

A.

30.60

B.

50.29

C.

50.28

D.

30.63

Correct answer is C

 75.0785
-35.624

--------------

40.4545

+9.83

-------------

50.28 to 2d.p 

352.

Evaluate: \(\frac{0.42 \div 2.5}{0.5 \times 2.95}\), leaving the answer in the standard form.

A.

1.639 x 10\(^2\)

B.

1.639 x 10\(^1\)

C.

1.639 x 10\(^{-1}\)

D.

1.639 x 10\(^{-2}\)

Correct answer is C

\(\frac{0.42 \div 2.5}{0.5 \times 2.05} = \frac{0.168}{1.025}\)

= 1.639 x 10\(^{-1}\)

353.

8, 18, 10,14, 18, 11, 13, 14, 13, 17, 15, 8, 16, and 13

The following are scores obtained by some students in a test. How many students scored above the mean score? 

A.

10

B.

9

C.

8

D.

7

Correct answer is D

Mean = \(\frac{8 + 18 + 10 + 14 + 18 + 11 + 13 + 14 + 13 + 17 + 15 + 8 + 16 + 13}{14}\)

Mean = \(\frac{188}{14}{\)

Mean = 13.4 

Number above the mean is 7