5 and 9
9 and 15
Two pairs of #'s with 10 as their least common multiple: 5x2 1x10
The product of all pairs of prime numbers is always the least common multiple of the two prime numbers.
12 and 18.12,24,36,48,60.18,36,54,72,90.
Two pairs of numbers with 105 as their least common multiple are (15, 105) and (21, 105). This means that both pairs of numbers are multiples of 105 and their only common multiple is 105. The least common multiple is the smallest number that both numbers can divide evenly into.
5,65,7
20 and 25
15 and 7 21 and 5
12 and 10 15 and 4
7 and 15 35 and 3
30 and 60 12 and 15
4 and 9 12 and 36
7 and 15 15 and 21