Question

Define HCF of two positive integers and find the HCF of the following pair of numbers:

75 and 243

Answer 1

By applying Euclid’s division lemma

243 = 75 × 3 + 18

Since remainder ≠ 0, apply division lemma on divisor of 75 and remainder 18.

75 = 18 × 4 + 3

Since remainder ≠ 0, apply division lemma on divisor of 18 and remainder 3.

18 = 3 × 6 + 0

∴ HCF of 243 and 75 is = 3.