What number goes into 40 and 158

Question

What’s numbers would go into 40 and 158 the same 

Answer 1

"go into" as in are factors of?

 

2 goes into each one; 4 does not; 5 does not. Since 40 = 5•2³ you need consider nothing else.

 

Answer: 2 (both are even numbers, and there is no other common factor)

Answer 2

Your question is unclear, but:

• Prime factors of 40 = 5·2·2·2
• Prime factors of 158 = 2·79

 

Greatest Common Factor = 2