Ex 5.1, 1 What will be the unit digit of the squares of the following numbers? (i) 81 Unit digit of 812 = Unit digit of 12 = Unit digit of 1 = 1 ∴ Unit digit of square of 81 = 1

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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 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.