Mathematics (Core)
Paper 1 | Objectives | 50 Questions
WASSCE/WAEC MAY/JUNE
Year: 1991
Level: SHS
Time:
Type: Question Paper
Answers provided
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Paper 1 | Objectives | 50 Questions
WASSCE/WAEC MAY/JUNE
Year: 1991
Level: SHS
Time:
Type: Question Paper
Answers provided
No description provided
This paper is yet to be rated
There's no secret to passing WAEC or BECE apart from the merit of hard work and adequate preparation
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| # | Question | Ans |
|---|---|---|
| 1. |
Express 0.0462 in standard form A. 0.462 x 10-1 B. 0.462 x 10-2 C. 4.62 x 10-1 D. 4.62 x 10-2 E. 4.62 x 103
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Detailed Solution4.62 x 10-2 |
|
| 2. |
The population of a village is 5846. Express this number to three significant figures A. 5850 B. 5846 C. 5840 D. 585 E. 584
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Detailed Solution5846 \(\approxeq\) 5850 (to 3 s.f.) |
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| 3. |
Simplify: log6 + log2 - log12 A. -4 B. -1 D. 1 E. 4
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Detailed Solutionlog 6 + log 2 - log 12= \(\log (\frac{6 \times 2}{12})\) = \(\log 1\) = 0 |
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| 4. |
Find the number whose logarithm to base 10 is 2.6025 A. 400.4 B. 0.4004 C. 0.04004 D. 0.004004 E. 0.0004004
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Detailed SolutionFor the log to be 2.6025, there must be three digits before the decimal point. |
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| 5. |
Simplify: \((\frac{1}{4})^{-1\frac{1}{2}}\) A. 1/8 B. 1/4 C. 2 D. 4 E. 8
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Detailed Solution\((\frac{1}{4})^{-1\frac{1}{2}}\)= \((\frac{1}{4})^{-\frac{3}{2}}\) = \((\sqrt{\frac{1}{4}})^{-3}\) = \((\frac{1}{2})^{-3}\) = \(2^3\) = 8 |
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| 6. |
For what value of y is the expression \(\frac{y + 2}{y^{2} - 3y - 10}\) undefined? A. y = 0 B. y = 2 C. y = 3 D. y = 5 E. y = 10
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Detailed Solution\(\frac{y + 2}{y^2 - 3y - 10}\)\(y^2 - 3y - 10 = 0 \implies y^2 - 5y + 2y - 10 = 0\) \(y(y - 5) + 2(y - 5) = 0\) \((y - 5)(y + 2) = 0\) \(\frac{y + 2}{(y - 5)(y + 2)} = \frac{1}{y - 5}\) \(\therefore\) At y = 5, the expression \(\frac{y + 2}{y^2 - 3y - 10}\) is undefined. |
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| 7. |
Factorize 3a\(^2\) - 11a + 6 A. (3a - 2)(a - 3) B. (2a -2)(a - 3) C. (3a - 2)(a + 3) D. (3a + 2)(a - 3) E. (2a-3)(a + 2)
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Detailed Solution3a\(^2\) - 11a + 63a\(^2\) - 9a - 2a + 6 3a(a - 3) - 2(a - 3) = (3a - 2)(a - 3) |
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| 8. |
Solve the equation: 3a + 10 = a\(^2\) A. a = 5 or a = 2 B. a = -5 or a = 2 C. a = 10 or a = 0 D. a = 5 or a = 0 E. a = 5 or a = -2
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Detailed Solution3a + 10 = a\(^2\)a\(^2\) - 3a - 10 = 0 a\(^2\) - 5a + 2a - 10 = 0 a(a - 5) + 2(a - 5) = 0 (a - 5)(a + 2) = 0 a = 5 or a = -2. |
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| 9. |
Simplify \((\frac{3}{x} + \frac{15}{2y}) \div \frac{6}{xy}\) A. \(\frac{2y - 5x}{4}\) B. \(\frac{9(2x - 5x)}{x^2y^2}\) C. \(\frac{5x - 2y}{2}\) D. \(\frac{c^2y^2}{18y - 45x}\) E. \(\frac{4}{2y - 5x}\)
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Detailed Solution\((\frac{3}{x} - \frac{15}{2y}) \div \frac{6}{xy}\)= \((\frac{6y - 15x}{2xy}) \div \frac{6}{xy}\) = \(\frac{6y - 15x}{2xy} \times \frac{xy}{6}\) = \(\frac{3(2y - 5x)}{2xy} \times \frac{xy}{6}\) = \(\frac{2y - 5x}{4}\) |
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| 10. |
Simplify: 1/4(2n - 2n+2) A. 2n2 - 2n B. 2n-2(1-2n) C. 2n + 22n + 2 D. 22n
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Detailed Solution1/4(2n - 2n+2) = 2-2(2n - 2n x 22) = 2n x -2(1 - 22)= 22n-2(20 - 22) = 22n-2 - 2n |
Preview displays only 10 out of the 50 Questions