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.

3,471.

An arc of length 22cm subtends an angle of θ at the center of the circle. What is the value of θ if the radius of the circle is 15cm?[Take π = 22/7]

A.

70o

B.

84o

C.

96o

D.

156o

E.

168o

Correct answer is B

\(2\pi r = 2 \times 3.142 \times 15 = 94.28cm\)

\(94.28cm = 360°\)

\(1cm = \frac{360°}{94.28}\)

\(\therefore 22cm = \frac{360°}{94.28} \times 22\)

= 84°

3,472.

Find the values of x for which y = 5

A.

-2.5, 2.0

B.

-2.6, 2.1

C.

-2.0, 1.5

D.

-2.0, 2.0

E.

0, 0

Correct answer is B

No explanation has been provided for this answer.

3,473.

From the graph determine the roots of the equation y = 2x2 + x - 6

A.

-3, 4

B.

-2, -6

C.

-2, 1.5

D.

-1, 1

E.

2, 1.5

Correct answer is C

No explanation has been provided for this answer.

3,474.

Find the 4th term of an A.P, whose first term is 2 and the common difference is 0.5

A.

0.5

B.

2.5

C.

3.5

D.

4

E.

4.5

Correct answer is C

\(U_{n} = a + (n - 1)d\)

\(U_{4} = 2 + (4 - 1) \times 0.5\)

= \(2 + 1.5\)

= 3.5

3,475.

While doing his physics practical, Idowu recorded a reading as 1.12cm instead of 1.21cm. Calculate his percentage error

A.

1.17%

B.

6.38%

C.

7.44%

D.

8.035%

E.

9.00%

Correct answer is C

%error = \(\frac{1.21 - 1.12}{1.21} \times 100%\)

= \(\frac{9}{121} \times 100%\)

= 7.44%