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.

2,081.

Find the median of the numbers 89, 141, 130, 161, 120, 131, 131, 100, 108 and 119

A.

131

B.

125

C.

123

D.

120

Correct answer is B

Explanation
Arrange in ascending order

89, 100, 108, 119, |120, 130|, 131, 131, 141, 161

Median = \(\frac{120 + 130}{2}\)

= 125

2,083.

An open rectangular box externally measures 4m x 3m x 4m. Find the total cost of painting the box externally if it costs N2.00 to paint one square meter

A.

N96.00

B.

N112.00

C.

N136.00

D.

N160.00

Correct answer is B

Total surface area(s) = 2(4 x 3) + 2(4 x 4)

= 2(12) + 2(16)

= 24 + 32

= 56cm2

1m2 costs N2.00

∴ 56m∴ will cost 56 x N2.00

= N112.00

2,084.

If U and V are two distinct fixed points and W is a variable points such that UWV is a right angle, what is the locus of W?

A.

The perpendicular bisector of UV

B.

A circle with UV as radius

C.

A line parallel to the line UV

D.

A circle with the line UV as the diameter

Correct answer is D

No explanation has been provided for this answer.

2,085.

Find the total surface area of solid cone of radius 2\(\sqrt{3}\)cm and slanting side 4\(\sqrt{3}\)

A.

8\(\sqrt{3}\pi \)cm2

B.

24\(\pi \)cm2

C.

15\(\sqrt{3}\pi \)cm2

D.

36\(\pi \)cm2

Correct answer is D

Total surface area of a solid cone

r = 2\(\sqrt{3}\)

= \(\pi r^2\) + \(\pi\)rH

H = 4\(\sqrt{3}\), \(\pi\)r(r + H)

∴ Area = \(\pi\)2\(\sqrt{3}\) [2\(\sqrt{3}\) + 4\(\sqrt{3}\)]

= \(\pi\)2\(\sqrt{3}\)(6\(\sqrt{3}\))

= 12\(\pi\) x 3

= 36\(\pi \)cm2