Any multiple of 30.
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The primes between 1 and 10 are:2, 3, 5, 7The primes between 1 and 10 are:2, 3, 5, 7The primes between 1 and 10 are:2, 3, 5, 7The primes between 1 and 10 are:2, 3, 5, 7
1, 2, 3, 5, 6, 10, 15, 30.
1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340.
3 and 5, yes. 2, 9 and 10, no.
The common factors are: 1, 2, 3, 5, 6, 10, 15, 30.