General knowledge Material- all Competitive

What is the fourth proportional to 24, 120 and 22?
  1. 110
  2. 112
  3. 105
  4. 109
Area of 4 walls of a cuboid 400 sq cm, its length is 15 cm and height is 8 cm. What is its breadth (in cm)?
  1. 12
  2. 10
  3. 11
  4. 8
A trader had 1200 kgs of rice. He sold a part of it at 5% profit and the rest at 11% profit, so that he made a total profit of 7%. How much (in kg) wheat did he sell at 5%
  1. 900
  2. 800
  3. 700
  4. 600
The simple and compound interest that can be earned in two years at the same rate is Rs 1,000 and Rs 1,040 respectively. What is the rate (percent per annum) of interest?
  1. 9
  2. 8
  3. 12
  4. 3
20% of a = b, then b% of 20 is the same as _________ of a.
  1. 80%
  2. 40%
  3. 8%
  4. 4%
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