A number is increased by 10% and then the new number is decreased by 10%. If the final result is 99, find the original number. MCQ with Answer and Explanation
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Question #1
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The price of an article is increased by 25% and then decreased by x%. If the net effect is no change, find x.
Correct Answer: Option C
Explanation:
1.25 × (1 - x/100) = 1 → 1 - x/100 = 0.8 → x/100 = 0.2 → x=20.
1.25 × (1 - x/100) = 1 → 1 - x/100 = 0.8 → x/100 = 0.2 → x=20.
This question belongs to:
Maths
Percentage
Question #2
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A number is such that 25% of it is 5 more than 20% of it. Find the number.
Correct Answer: Option A
Explanation:
0.25x = 0.2x + 5 → 0.05x = 5 → x = 100.
0.25x = 0.2x + 5 → 0.05x = 5 → x = 100.
This question belongs to:
Maths
Percentage
Question #3
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In an election, the losing candidate secured 40% of the votes and lost by 1200 votes. What was the total number of votes?
Correct Answer: Option B
Explanation:
Loser = 40%, Winner = 60%. Difference = 20%. 20% of Total = 1200. Total = 1200 * (100 / 20) = 6000.
Loser = 40%, Winner = 60%. Difference = 20%. 20% of Total = 1200. Total = 1200 * (100 / 20) = 6000.
This question belongs to:
Maths
Percentage
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