Waste less time on Facebook — follow Brilliant.

Quick Calculations 2: Divisibility by 7

A proposed rule for divisibility by 7 can be found here.

Is this reliable? Or is there a better way? Or is straight-out dividing the best?

Note by David Lee
3 years, 5 months ago

No vote yet
1 vote


Sort by:

Top Newest

So far, this can be considered an efficient method, but is cumbersome with very large numbers, where algebra is required.

Nanayaranaraknas Vahdam - 3 years, 5 months ago

Log in to reply


Problem Loading...

Note Loading...

Set Loading...