• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Given a number in base 10, is there a trick for determining if it is divisible by 7?

Take the last digit...double it...subtract it from the number....if the result is divisible by 7...then the original number is....keep doubling and subtracting as needed...
 
Originally posted by: Doodoo
Take the last digit...double it...subtract it from the number....if the result is divisible by 7...then the original number is....keep doubling and subtracting as needed...
Click to expand...
doesnt work 😛
maybe youre thinking of this method
 
Yeah i think thas the one i was thinkin of....i remember it from a video i saw in math class like 10 yrs ago. It was the video with that one math wiz that would do crazy calculations in his head......
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top