A prime number is a natural number greater than 1 which has no divisor other than 1 and itself. The least common multiple (LCM) of two numbers is the smallest non zero number which is a multiple of both numbers. considering the L.C.M of two primes : 2 and 3 , here the L.C.M = 2×3=6. hope this helps!
The prime factors of 4 are 2 and 2, the prime factors of 6 are 2 and 3. So the least common multiple will be the maximum number of factors of 2 (that's two) and the maximum number of factors of 3 (that's one). So it is 2 x 2 x 3 = 12. For a harder example, consider 84 and 315.A
