GCF (HCF) of 55 and 121
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What is the Greatest Common Divisor of 55 and 121?
Answer
GCF (HCF) of 55 and 121 is
11
Common factors: 1, 11
11 divides both: 55 ÷ 11 = 5, 121 ÷ 11 = 11 — and 5 and 11 share no factor but 1, so no larger number divides both.
55 = 5 × 11
121 = 112
| Prime | 55 | 121 | Lowest power |
|---|---|---|---|
| 5 | 5 | — | — |
| 11 | 11 | 112 | 11 |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 11
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See Also
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
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GCF Table
| Number 1 | Number 2 | GCF |
|---|---|---|
| 55 | 106 | 1 |
| 55 | 107 | 1 |
| 55 | 108 | 1 |
| 55 | 109 | 1 |
| 55 | 110 | 55 |
| 55 | 111 | 1 |
| 55 | 112 | 1 |
| 55 | 113 | 1 |
| 55 | 114 | 1 |
| 55 | 115 | 5 |
| 55 | 116 | 1 |
| 55 | 117 | 1 |
| 55 | 118 | 1 |
| 55 | 119 | 1 |
| 55 | 120 | 5 |
| 55 | 121 | 11 |
| 55 | 122 | 1 |
| 55 | 123 | 1 |
| 55 | 124 | 1 |
| 55 | 125 | 5 |
| 55 | 126 | 1 |
| 55 | 127 | 1 |
| 55 | 128 | 1 |
| 55 | 129 | 1 |
| 55 | 130 | 5 |
| 55 | 131 | 1 |
| 55 | 132 | 11 |
| 55 | 133 | 1 |
| 55 | 134 | 1 |
| 55 | 135 | 5 |