alleryHCF(6, 20) is 2 and LCM(6, 20) is:
A30
B10
C60
D120
Answer & Solution
Correct answer: C. 60
1. 6 is 2 x 3 and 20 is 2 x 2 x 5.
2. Take the greatest power of each prime.
3. 2 x 2 x 3 x 5 is 60.
_Source: syllabus Mathematics, Chapter 1, Real Numbers._
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