Problem 44227. Divisible by 21

Created by Said BOUREZG

Like (0)

Solve Later

Write a function to determine if a number is divisible by 21.

Solve

Solution Stats

129 Solutions
53 Solvers

Last Solution submitted on Aug 31, 2025

Last 200 Solutions

Problem Comments

4 Comments

4 Comments

Show 1 older comment

Jean-Marie Sainthillier on 30 May 2017

Divisible by 21 or by 7 ?
What is the name of the function that you want ?
divisible_by_21.m or divisible_by_7.m (you test both)
Why do you forbid all these functions ?

Jean-Marie Sainthillier on 30 May 2017

A lot of why ...

goc3 on 31 May 2017

The problem maker in this case (no pun intended) simply copied the test case from my Divisible by 7 problem and made some edits, but obviously not enough to make it solvable. I've greatly simplified the test suite for this problem so that it is now solvable.

Jean-Marie Sainthillier on 1 Jun 2017

Thanks Grant.

Solution Comments

Show comments

Problem Recent Solvers53

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 44227. Divisible by 21

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers53

Suggested Problems

More from this Author14

Problem Tags

Community Treasure Hunt

Problem 44227. Divisible by 21

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers53

Suggested Problems

More from this Author14

Problem Tags

Community Treasure Hunt

Players