# NCERT Class 8 Mathematics Chapter 16 Playing with Numbers CBSE Board Sample Problems (For CBSE, ICSE, IAS, NET, NRA 2022)

Get top class preparation for CBSE/Class-8 right from your home: get questions, notes, tests, video lectures and more- for all subjects of CBSE/Class-8.

## Playing with Numbers

Numbers can be written in general form.

A two – digit Number ab will be written as

A three-digit Number will be written as

A four-digit Number will be written as

 Sr. no Divisibility How it works 1. Divisibility by 10 Numbers ending with 0 are divisible by 10Why?A three- digit Number will be written asSo c has to be 0 for Divisibility by 10 2. Divisibility by 5 Numbers ending with 0 and 5 are Divisible by 5Why?A three- digit Number will be written asSo c has to be 0 or 5 for Divisibility by 5 3. Divisibility by 2 Numbers ending with 0,2, 4,6 and 8 are divisible by 2Why?A three- digit Number will be written asSo c has to be 2,4, 6,8 or 0 for Divisibility by 2 4. Divisibility by 3 The sum of digits should be divisible by 3Why?A three- digit Number will be written asNow 9 is divisible by 3, so sum of digits should be divisible by 3 5. Divisibility by 9 The sum of digits should be divisible by 9Why?A three- digit Number will be written asNow 9 is divisible by 9, so sum of digits should be divisible by 9 6. Divisibility by 11 The difference between the sum of digits at its odd places and that of digits at the even places should be Divisibility by 11Why?

Developed by: