2. Factors
• Factors are the numbers you multiply
together to get a product.
• For example, the product 24 has several
factors.
• 24 = 1 x 24
• 24 = 2 x 12
• 24 = 3 x 8
• 24 = 4 x 6
• SO, the factors are 1, 2, 3, 4, 6, 8, 12, 24
3. Finding Factors
• Start with 1 x the number.
• Try 2, 3, 4, etc.
• When you repeat your factors, cross out
the repeat - you’re done at this point.
• If you get doubles (such as 4 x 4), then
you’re done. Repeats or doubles let
you know you’re done.
4. What are the factors of 16?
1 x 16
2 x 8
3 x ?? 3 is not a factor, so cross it out
4 x 4 doubles = done
The factors of 16 are
1,2,4,8 and 16
5. What are the factors of 18?
1 x 18 The factors are
2 x 9
1, 2, 3, 6, 9 and 18.
3 x 6
4 x ??
5 x ??
6 x 3 Repeat! Cross it out!
We’re done!
6. What are the factors of 7?
1 x 7 The only factors
2 x ?? of 7 are 1 and 7.
3 x ??
4 x ??
5 x ??
6 x ??
7 x 1 This works, but it is a repeat. We
are done.
7. What are the factors of 7?
1 x 7 The only factors
2 x ?? of 7 are 1 and 7.
3 x ??
4 x ??
5 x ??
6 x ??
7 x 1 This works, but it is a repeat. We
are done.
