Question

Section I has 16 questions of 1 mark each. Internal choice is provided in 5 questions.
1. Find the LCM of 6, 72 and 120.
OR​

Answer 1

Answer:

Step-by-step explanation:

6 = 2 × 3

72 = 23 × 32

120 = 23 × 3 × 5

Here, 21 and 31 are the smallest powers of the common factors 2 and 3, respectively.

23, 32 and 51 are the greatest powers of the prime factors 2, 3 and 5 respectively involved in the three numbers.

So, LCM (6, 72, 120) = 23 × 32 × 51 = 360

Answer 2

Answer:

6 = 2×3

72 = 2×2×2×3×3

120 = 2×2×2×3×5

Explanation:

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