RMSCET · Mathematics

LCM questions with answers

Build accuracy with explanation-led practice, then open a focused search or timed exam drill.

PRACTICE PREVIEW

Five questions to begin your revision

Open each answer only after choosing your own response.

01Medium · ✓ Verified answer

Rashtriya Military Schools CET practice check: What is the least common multiple of the consecutive numbers 20 and 21?

  1. 420
  2. 440
  3. 399
  4. 461
Check answer and explanation +
A — 420

Consecutive integers are coprime, so their LCM is their product: 20 × 21 = 420. The displayed answer was independently recomputed during publication.

Source: NCERT Mathematics Classes VI–X · LCM; mapped to the published Rashtriya Military Schools CET quantitative/numeracy area; answer independently recomputed. Syllabus-aligned practice—not a previous-year question.
02Medium · ✓ Verified answer

Rashtriya Military Schools CET high-priority drill: What is the least common multiple of the consecutive numbers 21 and 22?

  1. 483
  2. 440
  3. 505
  4. 462
Check answer and explanation +
D — 462

Consecutive integers are coprime, so their LCM is their product: 21 × 22 = 462. The displayed answer was independently recomputed during publication.

Source: NCERT Mathematics Classes VI–X · LCM; mapped to the published Rashtriya Military Schools CET quantitative/numeracy area; answer independently recomputed. Syllabus-aligned practice—not a previous-year question.
03Medium · ✓ Verified answer

Rashtriya Military Schools CET foundation revision: What is the least common multiple of the consecutive numbers 22 and 23?

  1. 483
  2. 551
  3. 506
  4. 528
Check answer and explanation +
C — 506

Consecutive integers are coprime, so their LCM is their product: 22 × 23 = 506. The displayed answer was independently recomputed during publication.

Source: NCERT Mathematics Classes VI–X · LCM; mapped to the published Rashtriya Military Schools CET quantitative/numeracy area; answer independently recomputed. Syllabus-aligned practice—not a previous-year question.
04Medium · ✓ Verified answer

Rashtriya Military Schools CET speed-building set: What is the least common multiple of the consecutive numbers 23 and 24?

  1. 599
  2. 552
  3. 575
  4. 528
Check answer and explanation +
B — 552

Consecutive integers are coprime, so their LCM is their product: 23 × 24 = 552. The displayed answer was independently recomputed during publication.

Source: NCERT Mathematics Classes VI–X · LCM; mapped to the published Rashtriya Military Schools CET quantitative/numeracy area; answer independently recomputed. Syllabus-aligned practice—not a previous-year question.
05Medium · ✓ Verified answer

Rashtriya Military Schools CET accuracy checkpoint: What is the least common multiple of the consecutive numbers 24 and 25?

  1. 600
  2. 624
  3. 575
  4. 649
Check answer and explanation +
A — 600

Consecutive integers are coprime, so their LCM is their product: 24 × 25 = 600. The displayed answer was independently recomputed during publication.

Source: NCERT Mathematics Classes VI–X · LCM; mapped to the published Rashtriya Military Schools CET quantitative/numeracy area; answer independently recomputed. Syllabus-aligned practice—not a previous-year question.
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