Find the LCM and HCF of the following integers by applying the prime factorization method .
(i) 12, 15 and 21 12 = 2 x 3 15 = 3 x 5 21 = 3 x 7 HCF = 3 LCM = 2 x 3 x 5 x 7 = 42O...
Tagged: Explain why 7 x 11 x 13 + 13 and 7 x 6 x 5 x 4 x 3 x 2 x 1 + 5 are composite numbers.
