The sum of LCM and HCF of smallest prime number and the smallest composite number is:
A. 4 B. 6 C. 10 D. 8
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.