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.

876.

A number of pencils were shared out among Bisi, Sola and Tunde in the ratio of 2:3:5 respectively. If Bisi got 5, how many were shared out?

A.

15

B.

25

C.

30

D.

50

Correct answer is B

Let x represent total number of pencils shared
B : S : T
2 : 3 : 5

2+3+5 = 10
\(\frac{2}{10}\) x x = 5
\(\frac{2x}{10}\) = 5
2x = 50
x = 25

877.

Simplify \(\frac{0.026 \times 0.36}{0.69}\). Leave your answer in standard form

A.

1.36 x 10-4

B.

1.36 x 10-3

C.

1.36 x 10-1

D.

1.36 x 10-2

Correct answer is D

\(\frac{0.026 \times 0.36}{0.69}\) = \(\frac{26 \times 10^-3 \times 36 \times 10^-2}{69 \times 10^-2}\)

= 0.01356 = 1.36 x 10-2

878.

Given U = {x: x is a positive integer less than 15} and P = {x: x is even number from 1 to 14}. Find the compliment of P.

A.

{1, 3, 5, 7, 9, 11, 13, 15}

B.

{2, 3, 5, 7, 9, 11, 13}

C.

{1, 3, 5, 7, 9, 11, 13}

D.

{2, 3, 5, 7, 11, 15}

Correct answer is C

U = {1, 2, 3, 4, 5......14}
P = {2, 4, 6, 8, 10, 12, 14}
P' = {1, 3, 5, 7, 9, 11,13}

880.

Calculate the perimeter of a sector of a circle of raduis 12cm and angle 60o.

A.

(12 + 4\(\pi\))cm

B.

(24 + 4\(\pi\))cm

C.

(12 + 6\(\pi\))cm

D.

(24 + 6\(\pi\))cm

Correct answer is B

Perimeter = 2r + \(\frac{\theta}{360}\) x 2\(\pi\)r
= 2(12) + \(\frac{60}{360}\) x 2 x \(\pi\) x 12
= (24 + 4\(\pi\))cm