Question 2 - Tests of Divisibility - Playing with Numbers

Last updated at Dec. 16, 2024 by

Ex 16.2, 2 - If 31z5 is a multiple of 9, what is the value of z?

Ex 16.2, 2 - Chapter 16 Class 8 Playing with Numbers - Part 2

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Question 2 If 31z5 is a multiple of 9, where z is a digit, what is the value of z? You will find that there are two answers for the last problem. Why is this so?We know that, A Number is divisible by 9, if sum of digits is divisible by 9 31z5 Sum of digits = 3 + 1 + z + 5 = 9 + z Let us check different values of z & check if number is divisible by 9 Sum of digits = 9 + z

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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 and Computer Science at Teachoo