NECO Mathematics Past Questions & Answers - Page 8

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36.

Find the mean deviation of 20, 25, 21, 27, 28, 29, to the nearest whole number

A.

2

B.

3

C.

4

D.

5

E.

6

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

37.

x varies directly as y and inversely as z. when x = 5, y = 2 and z = 1. What is the value of x when y = 5 and z = 2?

A.

2.5

B.

5

C.

6.25

D.

6.52

E.

7.5

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

38.

The chances of Usman and Dele passing a Mathematics test are 12 and 13 respectively. What is the probability that neither of them passes the test?

A.

\(\frac{3}{5}\)

B.

\(\frac{2}{5}\)

C.

\(\frac{4}{15}\)

D.

\(\frac{1}{5}\)

E.

\(\frac{2}{15}\)

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

39.

Two ladders of length 5m and 7m lean against a pole and make angles 45° and 60° with the ground respectively. What is their distance apart on the pole correct to two decimal places?

A.

9.60m

B.

6.06m

C.

2.54m

D.

2.53m

E.

2.00m

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

40.

A sector of angle 120° is cut out from a circle of radius 13.5cm. what area of the circle is remaining ? (π = \(\frac{22}{7}\))

A.

14.1cm²

B.

95.5cm²

C.

190.9cm²

D.

381.9cm²

E.

763.7cm²

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

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