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Question

What is the GCD of two numbers 56 and 63?
Evaluate using step diagram method.

A
7
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B
3
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C
2
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D
8
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Solution

The correct option is A 7
Prime factorization using step diagram for 56 and 63 as follows:


So, 56=2×2×2×7
and 63=3×3×7
GCD for both numbers is 7.

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