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.

3,091.

The graph of the quadratic expression

A.

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

B.

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

C.

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

D.

\(y=x + x + 2\)

E.

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

Correct answer is C

No explanation has been provided for this answer.

3,092.

In the diagram above, the area of triangle ABC is 35cm2, find the value of y

A.

5cm

B.

10cm

C.

17.5cm

D.

28cm

E.

70cm

Correct answer is B

No explanation has been provided for this answer.

3,093.

A die with faces numbered 1 to 6 is rolled once. What is the probability of obtaining 4?

A.

\(\frac{1}{36}\)

B.

\(\frac{1}{6}\)

C.

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

D.

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

E.

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

Correct answer is B

When the die is rolled, occasion of getting 4 

P(obtaining a 4) = \(\frac{1}{6}\)

= \(\frac{1}{6}\)

3,095.

Express as a single fraction: \(\frac{x}{x-2}-\frac{x+2}{x+3}\)

A.

\(\frac{2x^2 - 3x - 4}{(x-2)(x+3)}\)

B.

\(\frac{2x^2 + 3x - 4}{(x-2)(x+3)}\)

C.

\(\frac{2}{(x-2)(x+3)}\)

D.

\(\frac{ 3x + 4}{(x-2)(x+3)}\)

E.

\(\frac{3x - 4}{(x-2)(x+3)}\)

Correct answer is D

\(\frac{x}{x-2}-\frac{x+2}{x+3}\)

\(\frac{[x][x+3] - [x+2][x-2]}{[x-2][x+3]}\)

= \(\frac{x^2 + 3x - x^2 - 4}{[x-2][x+3]}\)

=  \(\frac{3x - 4}{[x-2][x+3]}\)