Percentage Aptitude Questions Practice Question and Answer
8 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?
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6082d43fbfeec334bc89ff8c- 127.5%false
- 237.5%true
- 325%false
- 460%false
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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 0602ccc529f2a38430905db41
602ccc529f2a38430905db41- 116 %true
- 215 %false
- 34 %false
- 420%false
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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 :
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60530f8fa01bc44789ad9bf0- 132false
- 230false
- 325true
- 420false
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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 06024e9e6835ee1737390482b
6024e9e6835ee1737390482b- 1Rs.72800true
- 2Rs.69680false
- 3Rs.84560false
- 4Rs.78400false
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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?
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60b70f6f2f692872ec8cf904- 144 %false
- 234 %false
- 354 %false
- 464 %true
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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.
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642822c87ac9a186e4e061e7- 12,29,484false
- 22,33,280true
- 32,21,785false
- 42,12,890false
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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 06426e27c72ca731a990e28e2
6426e27c72ca731a990e28e2- 115,972true
- 212,200false
- 311,200false
- 410,200false
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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=๐0ร(1+๐)๐P=P0ร(1+r)n
Where:
- ๐P = Population after ๐n years
- ๐0P0 = Initial population
- ๐r = Rate of increase (in decimal form)
- ๐n = Number of years
Given:
- ๐0=12,000P0=12,000 (Initial population)
- ๐=0.10r=0.10 (10% increase per annum)
- ๐=3n=3 (Number of years)
Substitute these values into the formula:
๐=12,000ร(1+0.10)3P=12,000ร(1+0.10)3
๐=12,000ร(1.10)3P=12,000ร(1.10)3
๐=12,000ร(1.331)P=12,000ร(1.331)
๐=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?
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60237f7ead295556282decb7- 1true
- 2false
- 39%false
- 410%false
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