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.

1,542.

The value x in the figure given is

A.

110o

B.

100o

C.

70o

D.

130o

Correct answer is D

Sum of the angles in a triangle = 180°

180° - x + 60 + 70 = 180

130° - x = 180° - 180° = 0°

x = 130°

1,543.

In the diagram given, find the value of x.

A.

30o

B.

40o

C.

45o

D.

15o

Correct answer is B

In the diagram above, < CDE = < CED = 15o

(base < s of isos. \(\bigtriangleup\))

< ECD = 180o - (15 + 15)o

= 180o - 30o = 150o

But x + 110o = 150o

(Sum of opp. interior < s of a\(\bigtriangleup\) = opp. exterior < )

x = 150o - 110o = 40o

1,544.

The graph above is correctly represented by

A.

y = x2 - x - 2

B.

y = x2 - 3x + 2

C.

y = x2 - x - 1

D.

y = x2 + x - 2

Correct answer is A

The graph crosses the x-axis at x = -1 and x = 2

Thus, x + 1 = 0 and x - 2 = 0

x\(^2\) - 2x + x - 2 = 0

x\(^2\) - x - 2 = 0

giving y = x\(^2\) - x - 2

1,545.