5 and 7
7 and 35
To find a pair of numbers with a given GCF, take the GCF number and double it. The pair of numbers is the GCF, and two times the GCF. For instance, two numbers with a GCF of 3 are 3 and 6.
If you have a set of integers, {a, b, c, ...} such that at least one pair is coprime, then the GCF of the set {7a, 7b, 7c, ... } is 7.
The GCF is a single number so there cannot be any pair of numbers in the answer.
14 and 35
A number pair whose GCF is the same as one of the numbers is i , i x j where i and j are integers greater than zero. If i=3 and j=5 then the number pair will be 3,15. The GCF is 3. If i=7 and j=11 the number pair will be 7,77 and the GCF 7. The number of possible solutions is infinite.
Yes.
Any consecutive even numbers have a GCF of 2.
The product of the GCF and LCM of a pair of numbers is equal to the product of the numbers.
Any pair of prime numbers as for example 19 and 23
7 and 35 (35 = 5*7)