explain why 7*11*13+13 is a composite number
Asked by prgayathri | 21st Apr, 2008, 07:29: PM
Expert Answer:
Fundamental them. of arithmetic every composite number can be expressed as a product of primes.
7x11x13 + 13 = 13 x ( 1 + 7 x11)
= 13 ( 7x11 + 1 )
= 13 x 78 which is a composite number
Answered by | 8th May, 2008, 01:04: PM
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