Question

The sum of LCM and HCF of smallest prime number and the smallest composite number is:

A. 4
B. 6
C. 10
D. 8

Answer 1

Hint: Smallest prime number is 2 and the smallest composite number is 4.

We know that the smallest prime number is 2 and the smallest composite number is 4. So, the least common multiple of 2 and 4 that is LCM (2,4) is 4. Also, Highest common factor that is HCF (2,4) is 2. And finally, the sum of both of them is $2 + 4 = 6$.

Note: We should learn what is the smallest prime number, smallest composite number and other important numbers.