GCF and LCM of 9 and 11
The greatest common factor and least common multiple of 9 and 11.
GCF of 9 and 11
1
LCM of 9 and 11
99
How it works
Break each number into its prime factors:
- 9 = 3²
- 11 = 11
The GCF (1) multiplies the primes both share, at the lowest power each appears. The LCM (99) multiplies every prime that appears in either number, at the highest power — which is also 9 × 11 ÷ 1 = 99.
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Frequently asked questions
What is the GCF of 9 and 11?+
The greatest common factor (GCF) of 9 and 11 is 1 — the largest number that divides both 9 and 11 with no remainder.
What is the LCM of 9 and 11?+
The least common multiple (LCM) of 9 and 11 is 99 — the smallest number that both 9 and 11 divide into. It equals 9 × 11 ÷ GCF = 99 ÷ 1 = 99.