If M=22×35,N=22×34, then the number of factors of N that are common with factors of M is
A
8
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B
5
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C
18
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D
15
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Solution
The correct option is D 15 M=22×35 Number of factor=(2+1)(5+1)=3×6=18 N=22×34 Number of factor=(2+1)(4+1)=3×5=15 Then the number of factors of N that are common with factors of M is 15