### Mathematics Past Questions

36

Evaluate $$\frac{(2.813 \times 10^{-3} \times 1.063)}{(5.637 \times 10^{-2})}$$ reducing each number to two significant figures and leaving your answer in two significant figures.

• A. 0.056
• B. 0.055
• C. 0.054
• D. 0.54
37
A man wishes to keep his money in a savings deposit at 25% compound interest so that after three years he can buy a car for N150,000. How much does he need to deposit?
• A. N112,000.50
• B. N96,000.00
• C. N85,714.28
• D. N76,800.00
38
If 31410 - 2567 = 340x, find x.
• A. 7
• B. 8
• C. 9
• D. 10
39

Simplify $$\frac{3(2^{n+1}) - 4(2^{n-1})}{2^{n+1} - 2^n}$$

• A. 2n+1
• B. 2n-1
• C. 4
• D. 1/4
40

If $$P344_{6} - 23P2_{6} = 2PP2_{6}$$, find the value of the digit P.

• A. 2
• B. 3
• C. 4
• D. 5