Question

find 18 and 63 lcm and hcf with method

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Answer 1

Answer:

The Greatest Common Factor (GCF) for 18 and 63, notation CGF(18,63), is 9.

Explanation: The factors of 18 are 1,2,3,6,9,18; The factors of 63 are 1,3,7,9,21,63.

• Find the prime factorization of 18.

• Find the prime factorization of 63. 63 = 3 × 3 × 7.

• Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM: LCM = 2 × 3 × 3 × 7.

LCM = 126.

Step-by-step explanation:

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