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Last updated at Feb. 20, 2019 by Teachoo

Transcript

Ex 16.1, 10 Find the values of the letters in each of the following and give reasons for the steps involved. Here, A + B ends with 9 A can be 0, 1, 2, 3,………..8, 9 B can be 0, 1, 2, 3…………8, 9 If we take maximum values of A and B, i.e. For A = 9 , B = 9 A + B = 9 + 9 = 18 ∴ A + B ≠ 19 So, A + B must be 9 ∴ A + B = 9 Hence, 2 + A will ends with 0. We put different values of A, and check which ends with 0 ∴ A = 8 Putting A = 8 Here, ∴ B = 1 Checking Putting A = 8, B = 1 Hence verified ∴ A = 8 and B = 1

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.