NECO Past Questions and Answers - Page 142

706.

Simplify \((216{\frac{1}{3}})^{-2}\)

A.

\(\frac{1}{36}\)

B.

\(\frac{1}{18}\)

C.

\(\frac{1}{13}\)

D.

\(\frac{1}{6}\)

E.

\(\frac{1}{3}\)

Correct answer is A

\((216^{\frac{1}{3}})^{-2}\)

= \(216^{\frac{-2}{3}}\)

= (3√216)\(^{-2}\)

= (6)\(^{-2}\)

= \(\frac{1}{6^2}\) 

=\(\frac{1}{36}\)

707.

The expression 4x2 - 4 has the following as its factors EXCEPT

A.

x - 1

B.

x + 1

C.

x2 -1

D.

4x + 1

E.

4x - 4

Correct answer is D

No explanation has been provided for this answer.

708.

Calculate (0.05 × 0.025) ÷ (4.25 × 3.35) and express your answer in standard form

A.

8.7796 × 105

B.

8.7796 × 104

C.

8.7796 × 103

D.

8.7796 × 10-3

E.

8.7796 × 10-5

Correct answer is E

No explanation has been provided for this answer.

709.

The angle subtended by a diameter of a circle at the circumference is a/an

A.

acute angle

B.

obtuse angle

C.

reflex angle

D.

right angle

E.

supplementary angle

Correct answer is D

No explanation has been provided for this answer.

710.

If the first term of an AP is 1.2 and the common difference is also 2, what is the mean of the first five terms?

A.

2

B.

4

C.

6

D.

8

E.

10

Correct answer is C

No explanation has been provided for this answer.