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.

1,241.

The graph is that of y = 2x² - 5x - 3. For what value of x will y be negative? What is the gradient of y = 2x² - 5x - 3 at the point x = 4?

11.1

10.5

10.3

9.9

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

1,242.

The bar chart shows the frequency distribution of marks scored by students in a class test. What is the median of the distribution?

View answer & explanation

Correct answer is A

median = (\(\frac{N + 1}{2}\))th = (\(\frac{25 + 1}{2}\))th

= \(\frac{26th}{2}\)

= 13th

the 13th is 2

1,243.

The bar chart shows the frequency distribution of marks scored by students in a class test. Calculate the mean of the distribution.

6.0

3.0

2.4

1.8

View answer & explanation

Correct answer is C

\(\begin{array}{c|c} x & f & fx\\ \hline 1 & 6 & 6 \\
2 & 8 & 16\\ 3 & 8 & 18\\ 4 & 5 & 20\end{array}\)

mean x = \(\frac{\sum fx}{\sum f}\)

= \(\frac{60}{25}\)

x = 2.4

1,244.

The bar chart shows the frequency distribution of marks scored by students in a class test. How many students are in the class?

View answer & explanation

Correct answer is C

6 + 8 + 6 + 5 = 25

1,245.

The position of three ships P,Q and R at sea are illustrated in the diagram. The arrows indicated the North direction. The bearing of Q from P is 050o and < PQR = 72o. Calculate the bearing of R and Q

155^o

80^o

158^o

91^o

View answer & explanation

Correct answer is C

< NPQ = < PQB = 50^o(alt. < s)

< PQB = 50^o

< PQR = < PQR < PQB + < QBR = 72^o

< QBR = < PQR - < PQB = 72^o - 50^o

= 22^o

< NQR = 180 - < QBR = 180^o - 22 = 158^o, the bearing of R from Q = 158^o