156
Yes.156/13 = 12
13
12. 13, if you count 200
13 is prime. It is divisible by 1 and 13.
13 and all its multiples are divisible by 13.
306 is not divisible by 13.
936. All numbers divisible by 12 and 13 are multiplies of the lowest common multiple of 12 and 13 which is 156. 999 ÷ 156 = 621/52 ⇒ greatest multiple of 156 not bigger than 999 is 6 x 156 = 936.
13
13
12 over 13. Common factor of 6. (Digits add to a number divisible by 3 and they are even). 12 over 13.
A number is divisible by 13 if it is a multiple of 13. In other words, 13 times a number results in a big number that is divisible by 13.
Some positive numbers are divisible by 13, but not all of them.