Write the smallest and the greatest 3-digit numbers and express them as the product of prime.

Write the smallest five digit number and express it in the form of its prime factors.

Find the HCF of the given numbers by prime factorisation method:

(i) 28, 36

(ii) 54, 72, 90

(iii) 105, 140, 175

Find the HCF of the given numbers by division method:

(i) 198, 429

(ii) 20, 64, 104

(iii) 120, 144, 204