No, and the first give-away is that it ends in "0", meaning it is divisible by 2, 5, 10.
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540 + 219 = 759 759 is evenly divisible by 3, 11, and 23, so it is not a prime number.
I have NOOO idea! Try finding their prime factorizations.
Composite. It has more than two factors.
Prime factorization of 540 = 2x2x3x3x3x5 Prime factorization of 80 = 2x2x2x2x5
There are 9 hours in 540 minutes.