One-What is the Greatest Common Factor of 6 and 15? {Find factors that crop up in both numbers 6 and 15}
Factors of 6-1 2 3 and 6 {Four}
Factors of 15-1 3 5 and 15 {Four}
Common Factors {as known as numbers that crop up in both numbers 6 and 15 in this case} and they are 1 and 3
Greatest Common Factor of 6 and 15 is 3
Two-What is the Greatest Common Factor of 45 and 105
Factors of 45-1 3 5 9 15 and 45 {Six}
Factors of 105-1 3 5 7 15 21 35 and 105 {Eight}
Common Factors of 45 and 105 {crop up}- 1 3 5 and 15
Greatest Common Factor {GCF} of 45 and 105 is 15
Three-What is the Greatest Common Factor of 24 and 40
Factors of 24-1 2 3 4 6 8 12 and 24 {Eight}
Factors of 40-1 2 4 5 8 10 20 and 40 {Eight}
Common Factors of 24 and 40 {crop up}-1 2 4 and 8
Greatest Common Factors {GCF} of 24 and 40 is 8
Four-What is the Greatest Common Factor of 27 and 126
Factors of 27-1 3 9 and 27 {Four}
Factors 126-1 2 3 6 9 14 18 21 42 63 and 126 {Eleven}
Common Factors {crop up} of 27 and 126-1 3 and 9
Greatest Common Factor of 27 and 126 is 9
Five-What is the Greatest Common Factor of 81 and 180
Factors of 81-1 3 9 27 and 81 {Five}
Factors of 180-1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 and 180 {Eighteen}
Common Factors {crop up} of 81 and 180 are 1 3 and 9
Greatest Common Factor of 81 and 180 is 9
Six-What is the Greatest Common Factor of 60 and 225
Factors of 60-1 2 3 4 5 6 10 12 15 20 30 and 60 {Twelve}
Factors of 225-1 3 5 9 15 25 45 75 and 225 {Nine}
Common Factors {crop up} of 60 and 225 are 1 3 5 9 and 15
Greatest Common Factor of 60 and 225 is 15
Seven-What is the Greatest Common Factor of 126 and 196
Factors of 126-1 2 3 6 9 14 18 21 42 63 and 126 {Eleven}
Factors of 196-1 2 4 7 14 28 49 98 and 196 {Nine}
Common Factors {crop up} of 126 and 196 are 1 2 and 14
Greatest Common Factor of 126 and 196 is 14
Eight-What is the Greatest Common Factor of 180 225 and 270
Factors of 180-1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 and 180 {Eighteen}
Factors of 225-1 3 5 9 15 25 45 75 and 225 {Nine}
Factors of 270-1 2 3 5 6 9 10 15 18 27 30 45 54 90 135 and 270 {Sixteen}
Common Factors {crop up} of 180 225 and 270 are 1 3 5 9 15 and 45
Greatest Common Factor of 180 225 and 270 is 15
Nine-What is the Greatest Common Factor of 72 and 252
Factors of 72-1 2 3 4 6 8 9 12 18 24 36 and 72 {Twelve}
Factors of 252-1 2 3 4 6 7 9 12 14 18 21 28 36 42 63 84 126 and 252 {Eighteen}
Common Factors {crop up} of 72 and 252 are 1 2 3 4 6 9 12 18 and 46
Greatest Common Factor of 72 and 252 is 36
and finally Ten-What is the Greatest Common Factor of 196 and 462
Factors of 196-1 2 4 7 14 28 49 98 and 196 {Nine}
Factors of 462-1 2 3 6 7 11 14 21 22 33 42 66 77 154 321 and 462
Common Factors {crop up} of 196 and 462 are 1 2 7 and 14
Greatest Common Factor of 196 and 462 is 14
