Question

5. Find LCM and HCF of 6 and 20 by the prime factorisation method. 90 and 372 by the prime factorisation method.
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Answer 1

Answer:

We need to find the “Highest Common factor” (HCF) and “Least Common Multiple” (LCM) of 90 and 144 by using prime factorization method.

The factors of 90 and 144 are

\begin{gathered} \bold{\begin{array}{l}{90=3 \times 3 \times 2 \times 5} \\ {144=2 \times 2 \times 2 \times 2 \times 3 \times 3}\end{array}}\end{gathered}

90=3×3×2×5

144=2×2×2×2×3×3

Therefore, we can calculate the LCM and HCF from above two steps.