Ex 3.3, 2 (a) - Chapter 3 Class 6 Playing with Numbers

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Ex 3.3, 2 Using divisibility tests, determine which of the following numbers are divisible by 4; by 8: (a) 572 Divisibility by 4
If last 2 digits are divisible by 4
Then, number is divisible by 4
Divisibility by 8
If last 3 digits are divisible by 8
Then, number is divisible by 8
Divisibility by 8
If last 3 digits are divisible by 8
Then, number is divisible by 8
Divisibility by 4
Last 2 digits are 72
Since remainder is 0,
72 is divisible by 4
∴ 572 is divisible by 4
Divisibility by 8
Last 3 digits are 572
Since remainder is not 0
∴ 572 is not divisible by 8

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.

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