To pass an exam, 35% is required. A student got 70 marks and failed by 35 marks. Maximum marks are: MCQ with Answer and Explanation
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Question #1
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A and B can do a work in 12 days. B and C in 15 days. A and C in 20 days. If A, B, and C work together, how long will they take?
Correct Answer: Option C
Explanation:
2(A+B+C) = 1/12 + 1/15 + 1/20 = (5+4+3)/60 = 12/60 = 1/5 → A+B+C = 1/10. Together 10 days.
2(A+B+C) = 1/12 + 1/15 + 1/20 = (5+4+3)/60 = 12/60 = 1/5 → A+B+C = 1/10. Together 10 days.
This question belongs to:
Maths
Percentage
Question #2
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If a number increased by 25% is 150, what is the original number?
Correct Answer: Option D
Explanation:
Let the number be x. x * 1.25 = 150. x = 150 / 1.25 = 120.
Let the number be x. x * 1.25 = 150. x = 150 / 1.25 = 120.
This question belongs to:
Maths
Percentage
Question #3
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A man gave 25% to wife, 20% of remainder to son, 25% of remainder to daughter, rest Rs. 9000 to charity. Total amount:
Correct Answer: Option B
Explanation:
Wife 25%, left 75%. Son 20% of 75%=15%, left 60%. Daughter 25% of 60%=15%, left 45% = 9000 → total = 20000.
Wife 25%, left 75%. Son 20% of 75%=15%, left 60%. Daughter 25% of 60%=15%, left 45% = 9000 → total = 20000.
This question belongs to:
Maths
Percentage
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