LCM Pairs
Pick a value to view its full reference table.
The least common multiple of 3 and 5 is 15 — the smallest positive number into which both 3 and 5 divide evenly. This page lists the first twelve common multiples of the pair, which are exactly the multiples of 15.
Every LCM pair page answers one query exactly — "what is the LCM of a and b" — with the number first and the reasoning right behind it. The pattern splits three ways: containment pairs (the smaller divides the larger, so the LCM is simply the larger number), coprime pairs (nothing shared, so the LCM is the plain product), and general pairs (the GCF shortens the product: a × b ÷ GCF). Each page carries the first twelve common multiples, the pairing identity LCM × GCF = a × b, and the prime-factorization view, so the same answer can be cross-checked three independent ways.
All 32 lcm pairs pages include a full data table, a worked explanation, and related calculators. Start withthe LCM of 3 and 5or jump straight to the value you need below.
- 3 & 5
- 3 & 8
- 3 & 12
- 4 & 5
- 4 & 8
- 5 & 6
- 5 & 7
- 6 & 8
- 6 & 9
- 6 & 10
- 6 & 12
- 7 & 14
- 8 & 12
- 8 & 16
- 9 & 12
- 9 & 15
- 10 & 15
- 12 & 16
- 12 & 18
- 12 & 20
- 12 & 24
- 14 & 21
- 15 & 20
- 16 & 24
- 18 & 24
- 20 & 30
- 21 & 28
- 24 & 36
- 25 & 40
- 28 & 42
- 30 & 45
- 36 & 48
FAQ
What is this LCM pairs reference?
The least common multiple of 3 and 5 is 15 — the smallest positive number into which both 3 and 5 divide evenly. This page lists the first twelve common multiples of the pair, which are exactly the multiples of 15.
Which values are covered?
32 tables, from the 3 and 5 pair up to the 36 and 48 pair.
What does each page include?
A full data table, a short worked explanation, and links to related calculators for that value.