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.

981.

Two angles of a triangle are 45º each and its longest side is 12cm. Find the length of one of the other sides

A.

12cm

B.

9\(\sqrt{2}\)cm

C.

6\(\sqrt{2}\)cm

D.

6cm

E.

3\(\sqrt{2}\)cm

Correct answer is C

Two angles of a triangle are 45º each and its longest side is 12cm, this simply describes an isosceles triangle

two equal angles and two equal sides

using Pythagoras theorem,

\(x^2 + x^2 = 12^2\)

 \(2x^2\) = 144

\(x^2\) = 72( after dividing b/sides by 2)

x = \(\sqrt{72} = 6\sqrt{2}\)cm.

982.

Find the surface area of a sphere whose radius is 3.5cm, correct your answer to one decimal place (π = \(\frac{22}{5}\))

A.

12.8cm2

B.

25.7cm2

C.

77.0cm2

D.

154.0cm2

E.

179.7cm2

Correct answer is D

No explanation has been provided for this answer.

983.

The length, breadth and height of a cuboid are 8cm, 7\(\frac{1}{2}\)cm and 6\(\frac{1}{2}\) cm respectively. What Is its volume in m3 (leave your answer in standard form)?

A.

3.9 × 10-1m3

B.

3.9 × 10-2m3

C.

3.9 × 10-3m3

D.

3.9 × 10-4m3

E.

3.9 × 10-5m3

Correct answer is D

No explanation has been provided for this answer.

985.

Simplify 2a2 -4ab - 6a2 - 10ab + 5ab - 5a2

A.

-9(a + b)

B.

9(a + b)

C.

-9a (a + b)

D.

9a(a - b)

E.

9b(a + b)

Correct answer is C

No explanation has been provided for this answer.