Which positive integers less than 12 are relatively prime to 12?

Solution:

Prime numbers are the numbers that have only two factors, that are, 1 and the number itself

A number is said to be relatively prime or co-prime to another number if both the numbers have a GCF of 1

For numbers less than 12, we know 

GCF (1, 12) = 1

GCF (2, 12) = 2

GCF (3, 12) = 3

GCF (4, 12) = 4

GCF (5, 12) = 1

GCF (6, 12) = 6

GCF (7, 12) = 1

GCF (8, 12) = 4

GCF (9, 12) = 3

GCF (10, 12) = 2

GCF (11, 12) = 1

Thus, the numbers less than 12 relatively prime to 12 are 1, 5, 7 and 11.

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Which positive integers less than 12 are relatively prime to 12?

Summary:

The numbers less than 12 relatively prime to 12 are 1, 5, 7 and 11.