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Which of the following is not a sphenic ...

Which of the following is not a sphenic number ?

A

30

B

42

C

60

D

70

Text Solution

Verified by Experts

The correct Answer is:
C
`30=2xx3xx5,42=2xx3xx7,60=2xx3xx5xx2`
`70=2xx5xx7`
Hence, the correct option is ( c)
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