Hello, teeplkyl!

In base-5, devise tests for divisibility by 2, 4, 5

Divisible by 2

If there is an even number of odd digits, the number is divisible by 2.

Examples: . is even (298). . is odd (517)

Divisible by 4

Add the digits.

If the sum is divisible by 4, the number is divisible by 4.

Example: .

. . . . . . . .Since 8 is divisible by 4, is divisible by 4 (872).

Divisible by 5

A number is divisible by 5 if it ends in zero (0).