Question

The letter L is prime factor less than 10, if L is also a factor of 42 and 35, what is L?

Answer 1

To find the prime factor that is less than 10 and is a factor of both 42 and 35, we can list the prime factors of both numbers and look for any that are common.

The prime factorization of 42 is 2 * 3 * 7.
The prime factorization of 35 is 5 * 7.

The only prime factor that is common to both numbers is 7.

Therefore, L is 7.