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NECO Mathematics Past Questions & Answers - Page 18

86.

One of the interior angles of a regular polygon is 120°. Find the number of sides of the polygon

A.

3

B.

4

C.

6

D.

9

E.

12

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

87.

Find the value of t such that the expression $\frac{1}{t}$ + $\frac{4}{3}$ - $\frac{5}{6t}$ + 1 is equal to zero

A.

$\frac{1}{6}$

B.

$\frac{1}{-14}$

C.

- $\frac{3}{2}$

D.

$\frac{7}{6}$

E.

$\frac{2}{5}$

View answer & explanation

Correct answer is B

$\frac{1}{t}$ + $\frac{4}{3}$ - $\frac{5}{6t}$ + 1 = 0

collect like terms

$\frac{4}{3}$ + 1 = $\frac{5}{6t}$ - $\frac{1}{t}$

$\frac{4 + 3}{3}$ = $\frac{-1}{6t}$

cross multiply

42t = - 3

t = $\frac{-3}{42t}$

t = $\frac{-1}{14}$

88.

If log₁₀² = 0.3010 and log₁₀³ = 0.4771, simplify: (Log₁₀⁸-log₉²) ÷ (Log₁₀⁹ - log₁₀²)

A.

4

B.

3

C.

0.0784

D.

-4

E.

-0.0784

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

89.

A bag contains p dozens of bananas and 3q of these proved to be bad. If I buy one third of the goods ones, how many do I get?

A.

P -3q

B.

$\frac{1}{3}$ (p - 3q)

C.

3q

D.

4p - q

E.

12p - 3q

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

90.

Four pupils have an average age of 12years and two other pupils of average age of 10.5years are added. What is the average age of the six pupils?

A.

10.5yrs.

B.

11yrs.

C.

11.5 yrs.

D.

12yrs.

E.

12.5yrs.

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

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