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Anonymous
It i.s easy to see that 147 is composite. Simply add up the digits. 1 + 4 + 7 = 12. 12 is divisible by three, therefore 147 is divisible by three ! This trick also works for division by nine.
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147=3x7x7
As a product of its prime factors: 3*7*7 = 147
composite composite
composite
It is composite.