MCQs / Quantitative Reasoning / Arithmetic & ratios

Arithmetic & ratios MCQs — Quantitative Reasoning

2 multiple-choice questions on Arithmetic & ratios from Quantitative Reasoning, each with the correct answer and, where available, a teacher's explanation. Read through them to revise the chapter, then practise the same questions one by one to test yourself.

1. Pipe A fills a tank in 6 hours and pipe B in 3 hours. Working together, how long do they take?

  1. 2 hours
  2. 4.5 hours
  3. 1.5 hours
  4. 9 hours

Answer: A) 2 hours

Explanation: Rates add: tfrac16+tfrac13=tfrac12 tank per hour, so 2 hours.

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2. A shirt costs Rs 1,200 after a 20% discount. What was the original price?

  1. Rs 1,440
  2. Rs 1,500
  3. Rs 1,400
  4. Rs 960

Answer: B) Rs 1,500

Explanation: 0.8P = 1200 Rightarrow P = dfrac12000.8 = 1500.

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