Question

What is the answer to this? I don’t

Answer 1

The numbers are {10, 11, 12, ... , 23, 24}.

Can we divide 11 by 1?  yes.  can we divide the other digit of 11 by 1?  yes.  Thus, 11 satisfies the criterion "they are divisible by each of their digits."

What about 12:  is 12 divisible by 1?  YES.  Is 12 divisible by 2?  YES.

And so on.

Answer 2

list all the possible numbers:

10 - cant be divisible by 0

11 - can be divided by 1 and 1

12 - can be divided by 1 and 2

13 - cant be divided by 3

14 - cant be divided by 4

15 - can be divided by 1 and 5

16 - cant be divided by 6

17 - cant be divided by 7

18 - cant be divided by 8

19 - cant be divided by 9

20 - cant be divided by 0

21 - cant be divided by 2

22 can be divided by 2 and 2

23 - cant be divided by 3

24 - can be divided by 2 and 4

 the numbers are  11, 12, 15,  22 and 24