7 and 15

35 and 3

The product of all pairs of prime numbers is always the least common multiple of the two prime numbers.

6 and 12 have a least common multiple of 12

Two pairs of #'s with 10 as their least common multiple: 5x2 1x10

5 and 6

9 and 5

Pick pairs of prime numbers. Pick any pairs of prime numbers.

15,4 10,60

The pairs that are relatively prime.

They are: 2 and 9, 1 and 18

(21,5)(15,7)

Pick any two numbers. All pairs of numbers have an LCM.

18 and 36, among others.

12 and 18. 12,24,36,48,60. 18,36,54,72,90.

15 and 7 21 and 5

12 and 18 18 and 36

12 and 10 15 and 4

2 and 15 10 and 15

2 and 5 5 and 10

4 and 9 12 and 18

How about: 2 3 4 and 6

12 and 18 4 and 9

21 and 35 7 and 15

15 and 12 30 and 4

7 and 15 35 and 3

7 and 15 15 and 21

4 and 9, 12 and 18

7 and 15 21 and 35

30 and 60 12 and 15

2, 10 5, 10

20 and 30, 4 and 15

1 and 11 -1 and 11

6 and 13 6 and 39

5,6 5,7

2 and 10 5 and 10

4 and 9 12 and 36

150 and 75 25 and 6

9 and 4 18 and 36

Any pair of prime or relatively prime numbers.

15 and 7 3 and 35

17 is the LCM of 1,17 and 17,17

4 and 8 6 and 9

2 and 24 4 and 6

That would depend entirely on the given number.

5 and 10 2 and 10 2 and 5

4 and 9 12 and 17

9 and 12 12 and 18

5 and 195 and 9519 and 95