Paper 1  Objectives  45 Questions
WASSCE/WAEC MAY/JUNE
Year: 1997
Level: SHS
Time:
Type: Question Paper
Source: Nigeria
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#  Question  Ans 

1. 
Express (0.0425 / 2.5) as a fraction A. 17/10,000 B. 17/1,000 C. 17/250 D. 17,100 E. 17/10
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Detailed Solution0.0425/2.5 = 425/25000 = 17/1000 

2. 
If P = {3, 5, 6} and Q = {4, 5, 6} then P∩Q equals A. {3, 4} B. {4, 5} C. {4, 6} D. {5, 6} E. {3, 5}
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Detailed SolutionP ∩ Q = {5, 6} 

3. 
A and B are two sets. The number of elements in A∪B is 49, the number in A is 22 and number in B is 34. How many elements are in A ∩ E? A. 105 B. 27 C. 15 D. 12 E. 7
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Detailed SolutionLet x represent the intersection34  x + 22  x + x = 49  x = 49  56; x = 7 

4. 
A student found the approximate value of 0.02548 correct to two places of decimal instead of two significant figures. Find the percentage error. A. 0% B. 131/3% C. 15 5/13% D. 2/3% E. 20%
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Detailed Solution0.02548 \(\approxeq\) 0.03 (to 2 decimal places)0.02548 \(\approxeq\) 0.025 (2 sig. figs) Error = 0.03  0.025 = 0.005 % error = \(\frac{0.005}{0.025} \times 100%\) = 20% 

5. 
Simplify log_{3}9 + log_{3}15  log_{3}5 A. log_{3}19 B. log_{3} C. 3 D. 1 E. o
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Detailed Solutionlog_{3} (9 x 15)/5 = log_{3}27 = 3 

6. 
Solve me equation: 2/3 (x + 5) = 1/4(5x  3) A. 1^{1}/_{7} B. 1^{8}/_{23} C. 3 D. 4^{3}/_{7} E. 7
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Detailed Solution2/3 (x + 5) = 1/4(5x  3)8x + 40 = 15x  9 7x = 49 x = 7 

7. 
Which of the following equations has its roots as 4 and 5? A. x^{2} + 4x  20 = 0 B. x^{2} + x + 20 = 0 C. x^{2}  x + 20 = 0 D. x^{2} + x  20 = 0 E. x^{2}  x  20 = 0
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Detailed Solution(x  4)(x + 5) = 0x\(^2\) + 5x  4x  20 = 0 x\(^2\) + x  20 = 0 

8. 
Solve the equations: 4x y = 11; 5x + 2y = 4. A. x = 6, y = 13 B. x = 2, y = 3 C. x = 2, y = 3 D. x = 2, y = 3 E. x = 2, y = 3.
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Detailed Solution4x  y = 11....(1) x 2 8x  2y = 22....(3)5x + 12y = 4....(2) x 1 5x + 2y = 4....(4) add eqn (3) and (4) 13x = 26 x = 2 4(2)  y = 11 \(\implies\) y = 8  11 y = 3. 

9. 
Make q the subject of the relation t = √^{pq}/_{r}  r^{2} A. q = rt^{2}/p  r^{3} B. q = t^{2}/p  r^{2} C. q = rt/p  r^{3} D. q = p  r^{3}/rt^{2} E. q = rt^{2}(p  r^{3}) 
A 
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