No.
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1+4+3 = 8 which is not divisible by 3, so 143 is not divisible by 3. 8 ÷ 3 has remainder 2, so 143 ÷ 3 has remainder 2.
No, it is not a prime. It is divisible by 11.
No.
143 is not a prime number; it is divisible by 11 and 13.Incidentally, it is divisible by 1; all numbers are.
It is 11*13 = 143