WAEC Mathematics Past Questions & Answers - Page 55

If M = {x : 3 $\leq$  x < 8} and N = {x : 8 <  x $\leq$ 12}, which of the following is true?

i. 8 $\in$ M $\cap$ N

ii. 8 $\in$ M $\cup$ N

iii. M $\cap$ N = $\varnothing$

The ages of Tunde and Ola are in the ratio 1:2. If the ratio of Ola's age to Musa's age is 4:5, what is the ratio of Tunde's age to Musa's age?

Evaluate $\frac{3\frac{1}{4} \times 1\frac{3}{5}}{11\frac{1}{3} - 5 \frac{1}{3}}$

If x varies inversely as y and y varies directly as z, what is the relationship between x and z?

Express 0.0000407, correct to 2 significant figures