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Class 10MathematicsReal NumbersHCF and LCM using prime factorisationEasyLevel 12
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What will be the LCM of (42), (63), and (105)?

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Answer and explanation

Correct answer: (630)

Step 1: (42=2\times3\times7), (63=3^2\times7), and (105=3\times5\times7). Step 2: The highest powers are (2), (3^2), (5), and (7). Step 3: (2\times9\times5\times7=630), so the LCM is (630).

Related tags

Real-NumbersLcmThree-Numbers

Frequently asked questions

What is the correct answer to this question?

(630)

Why is this the correct answer?

Step 1: (42=2\times3\times7), (63=3^2\times7), and (105=3\times5\times7). Step 2: The highest powers are (2), (3^2), (5), and (7). Step 3: (2\times9\times5\times7=630), so the LCM is (630).

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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