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All prime numbers are divisible only by one and themselves.
Well because it can be divide by 19 and 7 by 1 and its self. A prime number can only be divided by 1 and its self. In this case the number 133 is not only divisible by 1 and itself it is also divisible by 19 ,7 which makes it composite.
NO. 1110 is not divisible by 9. A number is divisible by 9 if the sum of its digits is divisible by 9. 1110 = 1 + 1 + 1 + 0 = 3 (3 is not divisible by 9, thus, 1110 is not divisible by 9.)
It is divisible by 1 and itself.