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.

937.

A sector of angle 120° is cut out from a circle of radius 13.5cm. what area of the circle is remaining ? (π = \(\frac{22}{7}\))

A.

14.1cm2

B.

95.5cm2

C.

190.9cm2

D.

381.9cm2

E.

763.7cm2

Correct answer is D

No explanation has been provided for this answer.

938.

Twenty girls and y boys sat on an examination. The mean marks obtained by the girls and boys were 52 and 57 respectively. if the total score for both girls and boys was 2750, find y.

A.

51

B.

48

C.

30

D.

25

E.

18

Correct answer is C

Let the total score for the girls and the boys be A and B respectively.

\(\frac{A}{20} = 52 \implies A = 52 \times 20\)

A = 1040

\(\frac{B}{y} = 57 \implies B = 57y\)

1040 + 57y = 2750

57y = 2750 - 1040

57y = 1710

y = \(\frac{1710}{57}\)

y = 30 

939.

If y2+ 14y + k is a perfect square, then k =

A.

4

B.

7

C.

28

D.

49

E.

196

Correct answer is D

No explanation has been provided for this answer.

940.

If 2x : ( x + 1) = 3 : 2, what is the value of x?

A.

\(\frac{1}{2}\)

B.

1

C.

1\(\frac{1}{2}\)

D.

3

E.

3\(\frac{1}{2}\)

Correct answer is D

No explanation has been provided for this answer.