NECO Past Questions and Answers - Page 131

651.

A chord 20cm long subtends an angle of 60° at the circumference of a circle, what is the diameter of the circle the nearest cm?

A.

12cm

B.

20cm

C.

23cm

D.

60cm

E.

80cm

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

652.

T varies directly as D and inversely as A. Given that T = 6, D = 3, and A = 2, find A when T = 3 and D = 6.

A.

4

B.

6

C.

8

D.

12

E.

24

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

653.

3 - 7, 8 - 12, 13 - 17, 18 - 22. Which of the following is/are true?
I. The class Interval is 4
II. The class boundaries are 2.5, 7.5, 12.5, 18.5, 22.5
III. The mid-marks are 5, 10, 15, and 20

A.

I only

B.

II only

C.

III only

D.

I and II only

E.

II and III only

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

654.

Simplify P^-6 × P³ × P² ÷ P⁴ × P⁰

A.

p⁵

B.

p⁴

C.

p³

D.

p^-3

E.

p^-5

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

655.

Find the standard deviation of the numbers 6, 9, 10, 8 and 7

A.

1.4

B.

2

C.

2.4

D.

5

E.

8

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

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