What is the smallest positive multiple of 6 that is also a multiple of 8 and 21?
Prime factorizations
6 = 2×3 (2 distinct prime factors) 8 = 2^3 (3 prime factors, 1 distinct) 21 = 3×7 (2 distinct prime factors)
LCM ==2^3 x 3 x 7 ==168
