Find the LCM and HCF of 12, 15 and 21 by applying the prime factorization method. [2 MARKS]
Prime factorisation : 1 Mark H.C.F : 0.5 Mark L.C.M : 0.5 Mark 212263
12 = 2×2×3
3155
15 = 3×5
3217
21 = 3×7
So H.C.F = 3
L.C.M = 420
Find the LCM and HCFof the following integers by applying the prime factorization method.
12,15and 21
Find the LCM and HCF of the following integers by applying the prime factorization method: 12,15and21.