Which of the following correctly describes how to use a prime factor Venn diagram to find the LCM of two numbers?

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Question

Which of the following correctly describes how to use a prime factor Venn diagram to find the LCM of two numbers?

Accepted Answer

B: Multiply together all the prime factors shown in the entire Venn diagram — The LCM is found by multiplying all prime factors in the entire Venn diagram (including those in the intersection), using each factor the correct number of times. Multiplying only the intersection gives the HCF, which is a common misconception.

Answer

D: Multiply together only the prime factors outside the intersection

Answer

C: Add together all the prime factors shown in the entire Venn diagram

Answer

A: Multiply together only the prime factors in the intersection of the two circles

Answer

B: Multiply together all the prime factors shown in the entire Venn diagram

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