1. There are two reasons that will confirm that:
1) Factors of 9: 1,3 and 9 (1 and multiples of 3 but none of the other 2 numbers are multiples of 3)
2) 53 is a Prime number (a number that has no factors other than 1 and itself)
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There are no COMMON factors]between '9' & '25'. '9' has the factors os 3, & 9. '25 has the factors of 5, & 25/
The factors of 18 are: 1, 2, 3, 6, 9, 18The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40The common factors are: 1, 2The Greatest Common Factor (GCF) is: 2
The factors of 24 are: 1, 2, 3, 4, 6, 8, 12, and 24.The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, and 40.The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72.The common factors of 24, 40, and 72 are: 1, 2, 4, and 8.The greatest common factor of 24, 40, and 72 is: 8.
Common factors of 9 and 18 are: 1, 3, and 9.
The factors of 9 are 1, 3 and 9. For them to be common, they need to be compared to another set of factors.