Which is the smallest number, having four different prime factors?
Question 12
I am the smallest number, having four different prime factors. Can you find me?
A number a has 7 as its smallest prime factor, and another number b has 3 as its smallest prime factor. What is the smallest prime factor of the number a−b?
A number a has 3 as its smallest prime factor, and another number b has 5 as its smallest prime factor. What is the smallest prime factor of the number a+b?