1 and 2
the phi of n is the number of positive integers below n which do not share any factors with it. for example, the phi of 30 is 8 because it does not share any factors with 8 numbers: 1,7,11,13,17,19,23,29 these are called co-primes
8 and 15 share no common factors aside from 1. 8 and 15 are coprime.
6, 7, and 8 share no common factors aside from 1.
4, 8, and 2.
8 and 5 share no common factors aside from 1.
8% of 450 = 36
1, 2, 4 and 8
8 + 450% = 12.5
These numbers do not share any common factors hence the least common multiple is the product-24.
12 can BE a factor of 12, 24, 36, 48, 60, 72, and so on forever. 12 can SHARE factors with any multiple of 2 or 3, since 12 = 2 x 2 x 3. For example, 12 and 18 share the factors 2, 3 and 6. As another example, 12 and 8 share the factors 2 and 4. But 12 and 31 share no factors since 31 cannot be divided by 2 or 3.
they share the factor 2, and of course 1
As 67 and 8 do not share any common factors - 67 is a prime number - the lowest number that can be divided by both of them is found by multiplying 67 by 8. This results in 536. Any whole number which is a multiple of 536 can also be 67 and 8.