43
If x * y = x + y\(^2\), find then value of (2*3)*5
- A. 36
- B. 25
- C. 11
- D. 55
44
If y varies directly as the square root of x and y = 3 when x = 16. Calculate y when x = 64
- A. 12
- B. 6
- C. 3
- D. 5
45
Factorize completely \(\frac{x^{3} + 3x^{2} – 10x}{2x^{2} – 8}\)
- A. x(x-5)2(x+2)
- B. x(x-5)2(x-2)
- C. x(x+5)2(x+2)
- D. x2+52x+4
46
In a survey of 50 newspaper readers, 40 read Champion and 30 read Guardian, how many read both papers?
- A. 10
- B. 5
- C. 15
- D. 20
47
Express the product of 0.21 and 0.34 in standard form
- A. 7.14 x 10-3
- B. 7.14 x 10-2
- C. 7.14 x 10-1
- D. 7.14 x 10-4
48
Rationalize \(\frac{2\sqrt{3} + \sqrt{5}}{\sqrt{5} – \sqrt{3}}\)
- A. (3 √ 15 +11) / 2
- B. 3 √ 15 -11
- C. (3 √ 15 -11) / 2
- D. 3 √ 15 +11
49
Evaluate \(\left(\frac{81}{16}\right)^{\frac{-1}{4}}\times 2^{-1}\)
- A. 1/3
- B. 3
- C. 6
- D. 1/6