WAEC Past Questions and Answers - Page 3704

18,516.

N140,000 is shared between ABU, Kayode and Uche. Abu has twice as much as Kayode, and Kayode has twice as much as Uche. What is Kayode's share?

A.

N80,000

B.

N40,000

C.

N20,000

D.

N10,000

Correct answer is B

\(Abu = 2x\\
Kayode = x\\
Uche = \frac{x}{2}\\
2x+x+\frac{x}{2}=140,000\\
\frac{7x}{2}=140,000\\
7x = 280,000\\
x=\frac{280,000}{7}\\
x=40,000\)Kayode receives N40,000

18,517.

Simplify\(\frac{3x^{3}}{(3x)^{3}}\)

A.

1

B.

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

C.

\(\frac{1}{9}\)

D.

\(\frac{1}{27}\)

Correct answer is C

\(\frac{3x^{3}}{(3x)^{3}}\\
\frac{3x^{3}}{3x\times 3x\times 3x}=\frac{3\times x\times x\times x}{3\times 3\times 3\times x\times x\times x}=\frac{1}{9}\)

18,518.

Which of the following is true for the set \(P = \{-3.2\leq x< 5\}\) where x is an integer

A.

least value of x is -3.2

B.

least value of x is -3

C.

greatest value of x is 4.9

D.

greatest value of x is 5

Correct answer is A

No explanation has been provided for this answer.

18,519.

Simplify \(3\sqrt{45}-12\sqrt{5}+16\sqrt{20}\)leaving your answer in surd form

A.

\(29\sqrt{5}\)

B.

\(14\sqrt{15}\)

C.

\(12\sqrt{15}\)

D.

\(11\sqrt{5}\)

Correct answer is A

\(3\sqrt{45}-12\sqrt{5}+16\sqrt{20}\\
3\sqrt{5\times 9}-12\sqrt{5}+16\sqrt{4\times 5}\\
3\times 3\sqrt{5}-12\sqrt{5}+16\times 2\sqrt{5}\\
9\sqrt{5}-12\sqrt{5}+32\sqrt{5}\\
29\sqrt{5}\)

18,520.

Which of the following characteristics differentiates a palisade cell from a liver cell? The possession of 

A.

a cell wall and a cytoplasm

B.

a vacuole and a nucleus

C.

non-cell membrane and chloroplast

D.

a cell wall and chloroplast

Correct answer is D

No explanation has been provided for this answer.