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![[Ganita Prakash] Divisibility by 3 - with 7+ Examples - Number Play - Divisibility Rules - 2, 5, 10 and 3](https://cdn.teachoo.com/570c85a1-dd09-432f-b0fe-6eb3e3ee4c87/slide8.jpg)
Divisibility by 3
Last updated at January 8, 2026 by Teachoo
Divisibility Rules - 2, 5, 10 and 3
Class 8 (Ganita Prakash - 1, 2 & Old NCERT)
Chapter 5 Class 8 - Number Play (Ganita Prakash)
- Sum of Consecutive Numbers
- Parity of Arithmetic & Algebraic Expressions
- Pairs to Make Fours
- Factors and Multiples
- Always, Sometimes, or Never
- What Remains?
- Figure it out - Page 122, 123
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Divisibility Rules - 2, 5, 10 and 3
- Shortcut for Divisibility by 9
- Figure it out - Page 126
- Shortcut for Divisibility by 11
- Divisibility Shortcuts for Other Numbers
- Digital Roots
- Figure it out - Page 131
- Digits in Disguise
- Figure it out - Page 132, 133, 134
Transcript
Divisibility by 3If sum of digits of number is divisible by 3, Then number is divisible by 3 Example Is 18 divisible by 3? Sum of digits = 1 + 8 = 9 And 9 is divisible by 3 So, 18 is divisible by 3 Is 39 divisible by 3? Sum of digits = 3 + 9 = 12 And 12 is divisible by 3 So, 39 is divisible by 3 Is 93 divisible by 3? Sum of digits = 9 + 3 = 12 And 12 is divisible by 3 So, 93 is divisible by 3 Is 270 divisible by 3? Sum of digits = 2 + 7 + 0 = 9 And 9 is divisible by 3 So, 270 is divisible by 3 Is 25 divisible by 3? Sum of digits = 2 + 5 = 7 But 7 is not divisible by 3 So, 25 is not divisible by 3 Is 37 divisible by 3? Sum of digits = 3 + 7 = 10 But 10 not divisible by 3 So, 37 is not divisible by 3 Is 260 divisible by 3? Sum of digits = 2 + 6 + 0 = 8 But 8 is not divisible by 3 So, 260 is not divisible by 3
