To find factor pairs for 54, we can identify pairs of numbers that, when multiplied together, equal 54.
Here are the pairs given and whether they multiply to give 54:
- 2 × 108 = 216 (not a factor pair)
- 2 × 27 = 54 (this is a factor pair)
- 4 × 18 = 72 (not a factor pair)
- 6 × 9 = 54 (this is a factor pair)
- 4 × 21 = 84 (not a factor pair)
The correct factor pairs for 54 from your list are:
- 2 × 27
- 6 × 9