Using divisibility tests, determine which of the following numbers are divisible by 4, 6, 8, 9 or 11:

(i) 197244

(ii) 613440

(iii) 4100448

In 92*389, replace * by a digit so that the number formed is divisible by 11.

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

(i) 24, 45

(ii) 180, 252, 324

Find the HCF of the given numbers by division method:

(i) 54, 82

(ii) 84, 120, 156