Question 4 - Fill in the steps - Playing with Numbers

Last updated at April 16, 2024 by Teachoo

Transcript

Question 4 If 31z5 is a multiple of 3, where z is a digit, what might be the values of z?
We know that,
A Number is divisible by 3, if sum of digits is divisible by 3
31z5
Sum of digits = 3 + 1 + z + 5
= 9 + z
Let us check different values of z
& check if number is divisible by 3
Sum of digits = 9 + z
∴ z can be 0, 3, 6 or 9

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.

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