11 - 20 of 63 Questions
# | Question | Ans |
---|---|---|
11. |
Find the number whose logarithm to base 10 is 2.6025 A. 0.0004 B. 4.004 C. 40.04 D. 400.4 E. 4004 |
D |
12. |
A piece of cloth was measured as 6.10m. If the actual length of the cloth is 6.35, find the percentage error, correct to 2 decimal places A. 3.05% B. 3.95% C. 15.00% D. 25.00% E. 39.30% |
B |
13. |
Simplify \(\frac{8^{\frac{2}{3}}*27^{\frac{-1}{3}}}{64^{\frac{1}{3}}}\) A. -3 B. \(\frac{1}{9}\) C. \(\frac{1}{3}\) D. \(\frac{27}{8}\) E. 4 Detailed Solution\(\frac{8^{\frac{2}{3}}*27^{\frac{-1}{3}}}{64^{\frac{1}{3}}}\)\(\frac{2^2*3^{-3}}{4} = 3^{-1} = \frac{1}{3}\) |
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14. |
Solve the equation 5x2 - 4x - 1 = 0 A. -1, 1/5 B. -1, -1/5 C. 1, 1/5 D. 1, -1/5 E. -1, 5 Detailed Solution5x2 - 4x - 1 = 05x2 5x + x -1 = 0 5x(x - 1) + (x - 1) = 0 (5x + 1)(x -1) = 0 x = -1/5 or 1 = 0 |
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15. |
P and q are two positive numbers such that p > 2q. Which one of the following statements is not true? A. -p < -2q B. -p > -2q C. -q < 2p D. q < 1/2p E. p2 > 2q2 |
B |
16. |
For what value of x is the expression
x - 5x2 - 2x - 3 not defined?A. 3, 1 B. -1, -3 C. -1, 3 D. 3, -2 E. 1, -3 Detailed Solutionx2 - 2x - 3 = 0x2 - 3x + x - 3 = 0 x(x - 3) + (x - 3) = 0 (x + 1)(x - 3) = 0 x = -1 or 3 |
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17. |
Make S the subject of the formula: \(V = \frac{K}{\sqrt{T-S}}\) A. \(T-\frac{K^2}{V^2} = S\) B. \(T+\frac{K^2}{V^2} = S\) C. \(T-\frac{K^2}{V} = S\) D. \(T-\frac{K}{V} = S\) E. \(T-\frac{K}{V^2} = S\) Detailed Solution\(V = \frac{K}{\sqrt{T-S}}\)square both sides of the equation \(V^2 = \frac{K^2}{T-S}\) cross multiply \(V^2 T - S = K^2\) \(T - S = \frac{K^2}{V^2}\) \(T = \frac{K^2}{V^2} + S\) \(T - = \frac{K^2}{V^2} = S\) |
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18. |
Find the equation whose roots are \(\frac{2}{3}and \frac{-1}{4}\) A. \(12x^2+11x+2=0\) B. \(12x^2-11x+2=0\) C. \(x^2-\frac{11}{12}x+2=0\) D. \(x^2+\frac{11}{12}x-2=0\) E. \(12x^2+11x+2=0\) |
A |
19. |
Find (X-Y) if 4x - 3y = 7 and 3x - 2y = 5 A. 4 B. 3 C. 2 D. -2 E. -3 |
C |
20. |
Solve the inequality \((Y-3)<\frac{y}{3}\) A. y > -9 B. y < 3 C. y > 4 D. y < 9 E. y > 0 Detailed Solution\((Y-3)<\frac{y}{3}\\3y - 9 < y\\ 2y< 9\\ y < 4\frac{1}{2}\) |
11. |
Find the number whose logarithm to base 10 is 2.6025 A. 0.0004 B. 4.004 C. 40.04 D. 400.4 E. 4004 |
D |
12. |
A piece of cloth was measured as 6.10m. If the actual length of the cloth is 6.35, find the percentage error, correct to 2 decimal places A. 3.05% B. 3.95% C. 15.00% D. 25.00% E. 39.30% |
B |
13. |
Simplify \(\frac{8^{\frac{2}{3}}*27^{\frac{-1}{3}}}{64^{\frac{1}{3}}}\) A. -3 B. \(\frac{1}{9}\) C. \(\frac{1}{3}\) D. \(\frac{27}{8}\) E. 4 Detailed Solution\(\frac{8^{\frac{2}{3}}*27^{\frac{-1}{3}}}{64^{\frac{1}{3}}}\)\(\frac{2^2*3^{-3}}{4} = 3^{-1} = \frac{1}{3}\) |
|
14. |
Solve the equation 5x2 - 4x - 1 = 0 A. -1, 1/5 B. -1, -1/5 C. 1, 1/5 D. 1, -1/5 E. -1, 5 Detailed Solution5x2 - 4x - 1 = 05x2 5x + x -1 = 0 5x(x - 1) + (x - 1) = 0 (5x + 1)(x -1) = 0 x = -1/5 or 1 = 0 |
|
15. |
P and q are two positive numbers such that p > 2q. Which one of the following statements is not true? A. -p < -2q B. -p > -2q C. -q < 2p D. q < 1/2p E. p2 > 2q2 |
B |
16. |
For what value of x is the expression
x - 5x2 - 2x - 3 not defined?A. 3, 1 B. -1, -3 C. -1, 3 D. 3, -2 E. 1, -3 Detailed Solutionx2 - 2x - 3 = 0x2 - 3x + x - 3 = 0 x(x - 3) + (x - 3) = 0 (x + 1)(x - 3) = 0 x = -1 or 3 |
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17. |
Make S the subject of the formula: \(V = \frac{K}{\sqrt{T-S}}\) A. \(T-\frac{K^2}{V^2} = S\) B. \(T+\frac{K^2}{V^2} = S\) C. \(T-\frac{K^2}{V} = S\) D. \(T-\frac{K}{V} = S\) E. \(T-\frac{K}{V^2} = S\) Detailed Solution\(V = \frac{K}{\sqrt{T-S}}\)square both sides of the equation \(V^2 = \frac{K^2}{T-S}\) cross multiply \(V^2 T - S = K^2\) \(T - S = \frac{K^2}{V^2}\) \(T = \frac{K^2}{V^2} + S\) \(T - = \frac{K^2}{V^2} = S\) |
|
18. |
Find the equation whose roots are \(\frac{2}{3}and \frac{-1}{4}\) A. \(12x^2+11x+2=0\) B. \(12x^2-11x+2=0\) C. \(x^2-\frac{11}{12}x+2=0\) D. \(x^2+\frac{11}{12}x-2=0\) E. \(12x^2+11x+2=0\) |
A |
19. |
Find (X-Y) if 4x - 3y = 7 and 3x - 2y = 5 A. 4 B. 3 C. 2 D. -2 E. -3 |
C |
20. |
Solve the inequality \((Y-3)<\frac{y}{3}\) A. y > -9 B. y < 3 C. y > 4 D. y < 9 E. y > 0 Detailed Solution\((Y-3)<\frac{y}{3}\\3y - 9 < y\\ 2y< 9\\ y < 4\frac{1}{2}\) |