4 ms·
Of course! I actually know of this divisible by 3 rule, and use it to test out all numbers, like 87, 111, or 69, but somehow forget to apply it to 51…
by bbx 5y ago
Of course! I actually know of this divisible by 3 rule, and use it to test out all numbers, like 87, 111, or 69, but somehow forget to apply it to 51…