Math (Practice Test-4)

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

  • 1
  • 2
  • 3
  • 4
Answer
1

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
Answer
4% Loss

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)
Answer
(-3, -1, 1, 3)

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

  • 1 : 3
  • 1 : 2
  • 3 : 4
  • r = √6
Answer
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
Answer
10 cm

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

  • 11
  • 14
  • 28
  • 2.8
Answer
11

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]
Answer
Φ

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

  • 4
  • 0
  • 1
  • 2
Answer
1

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
Answer
35 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
Answer
608