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Question

If 576=2a×3b=24c, then a+b+c is ___.

A
6
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B
8
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C
9
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D
10
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Solution

The correct option is D 10
Consider the equation 576=2a×3b=24c.
Prime factorisation of 576 is given by
576=2×2×2×2×2×2×3×3
=26×32
Also, 576=242.
a=6
b=2
c=2
Hence, a+b+c=10.

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