Problem 230. Project Euler: Problem 1, Multiples of 3 and 5

Created by Doug Hull

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If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below the input value.

Thank you to Project Euler Problem 1

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Last Solution submitted on Dec 29, 2025

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sukeerat syan on 22 Mar 2016

Nice one :)

Aaron on 11 Sep 2016

Very well thought problem. Took me a few minutes to see why the "simplest" solution was incorrect. Well posed problem.

Owen on 11 Jul 2022

Cool Problem!

Hrishikesh Patil on 19 Feb 2025

nicee

Avery Dolfel on 18 Dec 2025 at 7:15

good

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Problem 230. Project Euler: Problem 1, Multiples of 3 and 5

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Last 200 Solutions

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Problem Recent Solvers3656

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Problem 230. Project Euler: Problem 1, Multiples of 3 and 5

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers3656

Suggested Problems

More from this Author51

Problem Tags

Community Treasure Hunt

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