Percentage Aptitude Questions Practice Question and Answer

Q:

The length of a rectangle is increased by 60% then by how much % should the breadth be reduced so that its area does not change?

816 0

  • 1
    27.5%
    Correct
    Wrong
  • 2
    37.5%
    Correct
    Wrong
  • 3
    25%
    Correct
    Wrong
  • 4
    60%
    Correct
    Wrong
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Answer : 2. "37.5%"

Q:

A furniture salesman increased the value of furniture by 20 percent due to the lure of more income, which led to a decrease of 30 percent in his sales, then tell him what percentage was reduced in his income?

815 0

  • 1
    16 %
    Correct
    Wrong
  • 2
    15 %
    Correct
    Wrong
  • 3
    4 %
    Correct
    Wrong
  • 4
    20%
    Correct
    Wrong
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Answer : 1. "16 %"

Q:

A seller uses 920 gm in place of one kg to sell his goods. When he sells his articles at 15% gain on cost price, the actual percentage of profit is :

813 0

  • 1
    32
    Correct
    Wrong
  • 2
    30
    Correct
    Wrong
  • 3
    25
    Correct
    Wrong
  • 4
    20
    Correct
    Wrong
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Answer : 3. "25"

Q:

The value of a machine depreciates at the rate of 10% per annum. It was purchased 3 years ago. If its present value is Rs.53071.20, the purchase price of the machine was:

812 0

  • 1
    Rs.72800
    Correct
    Wrong
  • 2
    Rs.69680
    Correct
    Wrong
  • 3
    Rs.84560
    Correct
    Wrong
  • 4
    Rs.78400
    Correct
    Wrong
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Answer : 1. "Rs.72800"

Q:

A student multiplies a number by 5/3 instead of 3/5. What is the percentage error in the calculation?

808 0

  • 1
    44 %
    Correct
    Wrong
  • 2
    34 %
    Correct
    Wrong
  • 3
    54 %
    Correct
    Wrong
  • 4
    64 %
    Correct
    Wrong
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Answer : 4. "64 %"

Q:

The population of a city in the year 2020 was 2,00,000. The rate of growth of population is 8% per annum. Find the population of that city in the year 2022.

803 0

  • 1
    2,29,484
    Correct
    Wrong
  • 2
    2,33,280
    Correct
    Wrong
  • 3
    2,21,785
    Correct
    Wrong
  • 4
    2,12,890
    Correct
    Wrong
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Answer : 2. "2,33,280"

Q:

If the population of a town is 12.000 and the population increases at the rate of 10% per annum, then find the population. after 3 years.

797 0

  • 1
    15,972
    Correct
    Wrong
  • 2
    12,200
    Correct
    Wrong
  • 3
    11,200
    Correct
    Wrong
  • 4
    10,200
    Correct
    Wrong
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Answer : 1. "15,972"
Explanation :

To find the population after 3 years given that it increases at a rate of 10% per annum, you can use the formula for exponential growth:

๐‘ƒ=๐‘ƒ0ร—(1+๐‘Ÿ)๐‘›P=P0ร—(1+r)n

Where:

  • ๐‘ƒP = Population after ๐‘›n years
  • ๐‘ƒ0P0 = Initial population
  • ๐‘Ÿr = Rate of increase (in decimal form)
  • ๐‘›n = Number of years

Given:

  • ๐‘ƒ0=12,000P0=12,000 (Initial population)
  • ๐‘Ÿ=0.10r=0.10 (10% increase per annum)
  • ๐‘›=3n=3 (Number of years)

Substitute these values into the formula:

๐‘ƒ=12,000ร—(1+0.10)3P=12,000ร—(1+0.10)3

๐‘ƒ=12,000ร—(1.10)3P=12,000ร—(1.10)3

๐‘ƒ=12,000ร—(1.331)P=12,000ร—(1.331)

๐‘ƒ=15,972P=15,972

So, the population after 3 years would be approximately 15,972.


Q:

If the length of a rectangle is increased by 10% and the area is unchanged, then how much percent does the breadth decrease?

797 0

  • 1
    Correct
    Wrong
  • 2
    Correct
    Wrong
  • 3
    9%
    Correct
    Wrong
  • 4
    10%
    Correct
    Wrong
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Answer : 1. ""

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