Algebra MCQs

Question 1

If $$\left( {0.4x + \frac{1}{x}} \right) = 5,$$ what is the value of $$\left( {0.064{x^3} + \frac{1}{{{x^3}}}} \right)?$$

Accepted Answer

119

Answer

125

Answer

110

Answer

105

Question 2

If x 2 + 16 = -4x, then what is the value of x 3 - 64?

Accepted Answer

0

Answer

128

Answer

64

Answer

256

Question 3

If a + b = 8 and a + a 2 b + b + ab 2 = 128 then the positive value of a 3 + b 3 is:

Accepted Answer

152

Answer

96

Answer

224

Answer

344

Question 4

If 1.5a = 0.04b then $$\frac{{b - a}}{{b + a}}$$ is equal to?

Accepted Answer

$$\frac{{73}}{{77}}$$

Answer

$$\frac{{77}}{{33}}$$

Answer

$$\frac{2}{{75}}$$

Answer

$$\frac{{75}}{2}$$

Question 5

If x 2 - √7x + 1 = 0, then what is the value of $${x^5} + \frac{1}{{{x^5}}}?$$

Accepted Answer

19√7

Answer

25√7

Answer

27√7

Answer

21√7

Question 6

If a * b = 2a - 3b + ab, then 3 * 5 + 5 * 3 is equal to?

Accepted Answer

22

Answer

24

Answer

26

Answer

28

Question 7

If $$2x + \frac{2}{x} = 3{	ext{,}}$$ then the value of $${x^3} + \frac{1}{{{x^3}}} + 2$$ is?

Accepted Answer

$$\frac{7}{8}$$

Answer

$$ - \frac{9}{8}$$

Answer

$$ - \frac{{25}}{8}$$

Answer

11

Question 8

If a + b + c = 0, then a 3 + b 3 + c 3 is equal to?

Accepted Answer

3abc

Answer

a + b + c

Answer

abc

Answer

2abc

Question 9

If a = 2.361, b = 3.263, and c = 5.624, then the value of a 3 + b 3 - c 3 + 3abc is?

Accepted Answer

0

Answer

(p- q)(q - r) 3 + (r - p) 3

Answer

3(p - q)(q - r)(r - p)

Answer

1