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Ex 5.3, 1 What could be the possible ‘one’s’ digits of the square root of each of the following numbers? (iii) 998001We know that If a number ends with 1 if square root can end with 1 or 9 ∴ Possible unit digits = 1 or 9 Rough As 1^2 = 1 9^2 = 81 √1 = 1 √81 = 9

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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.