Math (Practice Test-4) |

1. Find the valve of X ? log 2x + log 6 = log 12.

- 1
- 2
- 3
- 4

2. If any goods price are increased by 20%, again reduced by 20%. What is gain or loss?

- 2% Gain
- 4% Loss
- 2% Loss
- 4% Gain

3. What is valve of x in equation x⁴ – 10x² + 9 = 0.

- (1, 2, -1, -2)
- (-2,-3, 2, 3)
- (-3, -1, 1, 3)
- (-1, -1, 2, 4)

4. A cube and sphere have equal area. Find the ratio between there volume?

- 1 : 3
- 1 : 2
- 3 : 4
- r = √6

5. In a parallelogram ABCD, AB = 24 cm, BC = 10 cm and diagonal AC = 20 cm. Find the height of parallelogram ?

- 25 cm
- 20 cm
- 15 cm
- 10 cm

6. Find the mean of 12, 15, 10, 9, 11, 14, 6.

- 11
- 14
- 28
- 2.8

7. If A = {1, 2, 3} B = {2, 4}, C = {2, 3} and D = {1, 3, 5, 7} then what is the value of B ⋂ (A ⋂ C) ?

- [1, 2, 3, 4]
- {2, 4}
- Φ
- [2, 4, 3]

8. If f(x) = x² + 2x + 1, the find the value of f(-1) + f(1).

- 4
- 0
- 1
- 2

9. A bicycle wheal makes 5,000 revolution in moving 11 kgn. What is radius of wheel ?

- 25 cm
- 30 cm
- 35 cm
- 50 cm

10. How many children will a school hall of diamension 20 m, 9.5 m and 8 m high accomulate, assuming 2.5 m³ of air is required for each children?

- 608
- 610
- 615
- 625