Question 37Asked in CTET February 2026 Paper 1, 1 Mar 2026

The LCM of 21, 36, and 66 is not a multiple of:21, 36 और 66 का LCM निम्न में से किसका गुणज नहीं  है ?

21, 36 और 66 का LCM निम्न में से किसका गुणज नहीं  है ?
  1. A4242
  2. B2828
  3. C7272
  4. D4444
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Correct answer: (C) 7272

Explanation

21 = 3 × 7, 36 = 2² × 3², 66 = 2 × 3 × 11, so LCM = 2² × 3² × 7 × 11 = 2772. 72 = 2³ × 3² needs 2³, which the LCM lacks, so 2772 is not a multiple of 72 (it is a multiple of 42, 28 and 44).21 = 3 × 7, 36 = 2² × 3², 66 = 2 × 3 × 11, इसलिए LCM = 2² × 3² × 7 × 11 = 2772। 72 = 2³ × 3² के लिए 2³ चाहिए, जो LCM में नहीं है, इसलिए 2772, 72 का गुणज नहीं है (यह 42, 28 और 44 का गुणज है)।

From CTET February 2026 Paper 1, 1 Mar 2026 — Previous Year Paper

This is question 37 of CTET February 2026 Paper 1, 1 Mar 2026 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.