What are the factors of 42 and 98

Factors of 42 1,2,3,6,7,14,21,42 factors of 98 1,2,7,14,49,98

What you would need to do is find the GCF. GCF means the greatest common factor. You can factor the number into primes and take the smallest. 7 is a factor of 42. Since 7x6=42 and 7x14=98, so it's a common factor. So is 2. We could factor 42 as 7x3x2 and 98 as 7x7x2. So from this I hope you understand that 7 and 2 is the common factor and 14 is the GCF.