N1,080.00
N2,400.00
N3,000.00
N3,600.00
Correct answer is B
Let value of store = X
Ratio of Taiwo's share to kehine's is 11:9 Keyinde sells \(\frac{2}{3}\) of her share to Taiwo for N720
\(\frac{2}{3}\) of 9 = 6
∴ Sum of the ratio = 11 + 9 = 20
\{\frac{6}{20}\) of x = N720
\(\frac{6x}{20}\) = 720
∴ x = \(\frac{720 \times 20}{6}\)
x = N24,000
A 5.0g of salt was weighted by Tunde as 5.1g. What is the percentage error?
20
2
1.1
0.2
Correct answer is B
% error = \(\frac{\text{actual error}}{\text{true value}}\) x 100
Where actual error = 5.1 - 5.0 = 0.1
true value = 5.0g
% error = \(\frac{0.1}{5.0}\) x 100
= \(\frac{10}{5}\)
= 2%
Simplify \(\frac{1\frac{1}{2}}{2 \div \frac{1}{4} \text{of } 32}\)
\(\frac{3}{256}\)
\(\frac{3}{32}\)
6
85
Correct answer is C
\(\frac{1\frac{1}{2}}{2 \div \frac{1}{4} \text{ of }32}\)
= \(\frac{\frac{3}{2}}{2 \div \frac{1}{4} \times 32}\)
\(\frac{3}{2} \times 4 = 6\)
For which of the following exterior angles is a regular polygon possible? i. 35° ii. 18° iii. 15°
i and ii
ii only
ii and iii
iii only
Correct answer is C
for a regular polygon to be possible, it must have all sides angles equal. \(\frac{360}{18}\) = 20 sides and \(\frac{360}{15}\) = 24 sides
(ii) and (iii) are right
110o
120o
130o
140o
Correct answer is D
Let the fifth interior angle be y: sum of interior angle of a pentagon
= (2 x 5 - 4) x 90o
= 6 x 90o
= 540o
(90 - x) + (90 + x) + (110 - 2x) + (110 + 2x) + y = 540o
400o + y = 540o
y = 540 - 400o
y = 140o