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Ex 1.1, 5 Check whether 6n can end with the digit 0 for any natural number n. Let us take the example of a number which ends with the digit 0 So, 10 = 2 × 5 100 = 2 × 2 × 5 × 5 Here we note that numbers ending with 0 has both 2 and 5 as their prime factors Whereas 6n = (2 × 3) n Does not have 5 as a prime factor. So, it does not end with zero. ∴ 6n cannot end with zero for any natural number n

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.