Mathematics Quiz - Competitive Exams RRB
Free practice quiz: Mathematics (Competitive Exams RRB). 109 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
Play all 109 questions freeSample questions
What is the value of √(0.0009)?
- 3
- 0.3
- 0.03
- 0.003
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Answer: C. 0.03
If the sum of the first n terms of an AP is n² + 3n, what is the 10th term?
- 23
- 21
- 24
- 22
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Answer: D. 22
A cistern can be filled by two pipes in 12 and 15 hours respectively, and emptied by a third pipe in 20 hours. If all three pipes are opened together, in how many hours will the cistern be filled?
- 12 hours
- 8 hours
- 10 hours
- 15 hours
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Answer: C. 10 hours
If the price of an article is first increased by 10% and then decreased by 10%, what is the net change in its price?
- 2% decrease
- No change
- 1% decrease
- 1% increase
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Answer: C. 1% decrease
If A = {1,2,3} and B = {3,4}, what is A ∩ B?
- {3}
- {4}
- {1,2}
- {1,2,3,4}
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Answer: A. {3}