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Question

If N is the number of positive integal solution of x1x2x3x4=770 then N is equal to

A
256
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B
729
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C
900
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D
none of these
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Solution

The correct option is A 256
Given,

x1x2x2x4=770

but, we have,

770=2×5×7×11

all of them are prime

Hence, Number of ways,

=44

=256

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