Question

Is 147 prime

Answer 1

secant.

Answer 2

is 1+4+7 divisible by 3
If so then no

Answer 3

That is a trick

Answer 4

Like if you take the sum of the digits of a number and it is divisible by 3 then the the number is divisible by 3

Answer 5

\[147=3*7^2 \]

Answer 6

Of course not all composite numbers are divisible by 3
but this one is