10 and 35
2 and 70
4 and 9, 12 and 18
It means write down three pairs of numbers that are relatively prime like 4 and 9, 5 and 6, 13 and 25
18 and 36 12 and 36
20 and 30 15 and 60
A common multiple
The product of all pairs of prime numbers is always the least common multiple of the two prime numbers.
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.
Two pairs of #'s with 10 as their least common multiple: 5x2 1x10
Pick any two numbers. All pairs of numbers have an LCM.
12 and 18.12,24,36,48,60.18,36,54,72,90.
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