EXERCISE 1.2 1. Express each number as a product of its prime factors:(i) 140(ii) 156(ii) 3825(iv) 5005(v) 74292. Find the LCM and HCF of the following pairs of integers and verify that LCM X HCF =product of the two numbers.(i) 26 and 91(i) 510 and 92(ii) 336 and 543. Find the LCM and HCF of the following integers by applying the prime factorisationmethod.(i) 12, 15 and 21 (ii) 17,23 and 29(iii) 8, 9 and 254. Given that HCF (306, 657) = 9, find LCM (306, 657).5. Check whether 6" can end with the digit 0 for any natural number n.6. Explain why 7x 11 x 13 + 13 and 7 x 6 x 5 x 4x3 x 2x1 +5 are composite numbers.7. There is a circular path around a sports field. Sonia takes 18 minutes to drive one roundof the field, while Ravi takes 12 minutes for the same. Suppose they both start at thesame point and at the same time, and go in the same direction. After how many minuteswill they meet again at the starting point?

EXERCISE 1.2 1. Express each number as a product of its prime factor

1.	EXERCISE 1.2 1. Express each number as a product of its prime factors:(i) 140(ii) 156(ii) 3825(iv) 5005(v) 74292. Find the LCM and HCF of the following pairs of integers and verify that LCM X HCF =product of the two numbers.(i) 26 and 91(i) 510 and 92(ii) 336 and 543. Find the LCM and HCF of the following integers by applying the prime factorisationmethod.(i) 12, 15 and 21 (ii) 17,23 and 29(iii) 8, 9 and 254. Given that HCF (306, 657) = 9, find LCM (306, 657).5. Check whether 6" can end with the digit 0 for any natural number n.6. Explain why 7x 11 x 13 + 13 and 7 x 6 x 5 x 4x3 x 2x1 +5 are composite numbers.7. There is a circular path around a sports field. Sonia takes 18 minutes to drive one roundof the field, while Ravi takes 12 minutes for the same. Suppose they both start at thesame point and at the same time, and go in the same direction. After how many minuteswill they meet again at the starting point?
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