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Subjects
Class 10MathematicsReal NumbersHCF and LCM using prime factorisationEasyLevel 11
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What is the LCM of (28) and (42)?

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Answer and explanation

Correct answer: (84)

Step 1: (28=2^2\times7) and (42=2\times3\times7). Step 2: The highest powers are (2^2), (3), and (7). Step 3: (4\times3\times7=84), so the LCM is (84).

Related tags

Real-NumbersLcmClass-10

Frequently asked questions

What is the correct answer to this question?

(84)

Why is this the correct answer?

Step 1: (28=2^2\times7) and (42=2\times3\times7). Step 2: The highest powers are (2^2), (3), and (7). Step 3: (4\times3\times7=84), so the LCM is (84).

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: HCF and LCM using prime factorisation.

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