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IPMAT Rohtak Lcm — practice questions

Explore 2 free Lcm questions in IPMAT Rohtak Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Lcm questions and exercises with answers

Showing questions 1–2 of 2.

Six bells toll at intervals of 2, 4, 6, 8, 10 and 12 seconds. In 30 minutes, how many times do they toll together?Read the answer and worked solution →The greatest four-digit number divisible by 15, 25, 40 and 75 is:Read the answer and worked solution →

Worked practice questions

Six bells toll at intervals of 2, 4, 6, 8, 10 and 12 seconds. In 30 minutes, how many times do they toll together?

  1. 4
  2. 10
  3. 15
  4. 16
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Correct answer: D. 16

1. They toll together every LCM(2,4,6,8,10,12) = 120 seconds. 2. In 30 minutes = 1800 seconds, number of intervals = 1800/120 = 15. 3. Counting the initial toll (t=0), total tolls together = 15 + 1 = 16. _Source: KMAT Karnataka 2021 PYQ Q.35_

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The greatest four-digit number divisible by 15, 25, 40 and 75 is:

  1. 9000
  2. 9400
  3. 9600
  4. 9800
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Correct answer: C. 9600

1. LCM(15, 25, 40, 75) = LCM of 3·5, 5², 2³·5, 3·5² = 2³·3·5² = 600. 2. Largest 4-digit multiple of 600: floor(9999/600) = 16, so 16 × 600 = 9600. 3. Therefore the answer is 9600. _Source: KMAT Karnataka 2021 PYQ Q.36_

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