3 ms·
The digits add to 0 in mod 9 and he's looking for precisely 9. eg. the sum of digits for 9^3 = 18. That's why you don't see 9's everywhere.
by AGoodName 8y ago
The digits add to 0 in mod 9 and he's looking for precisely 9. eg. the sum of digits for 9^3 = 18. That's why you don't see 9's everywhere.