Given:
The given numbers are 40 and 42.
Required:
We gave to find the GCD of the given numbers.
Step-by-step explanation:
To find the GCD of the given numbers we have to find the factors of the given numbers.


The GCD means the greatest common factor. And we can see that only one 2 is present in both the factors. So the required GCD is 2.
Final answer:
Hence the final answer is 2.