Yeah, of course you can:
25, 34, 43, 52, 61, 70
Two-digit prime numbers whose digits add up to 10 are:193773
Any number whose digits do not add up to 9, 18 or 27. There are 800 of them!
The only two digit numbers whose digits add up to 17 are 89 and 98. Since 98 is an even number, 89 is prime.
The numbers are called the summands. The digits would therefore be components of the summands.
All numbers whose digits finally add up to 9 are divisible by 9 as for example 81 => 8+1 is 9 and so 81 is divisible by 9
All two digit numbers which the digits add up to 11 are :- 29, 38, 47, 56, 65, 74, 83 & 92.
Two-digit prime numbers whose digits add up to 10 are:193773
Any number whose digits do not add up to 9, 18 or 27. There are 800 of them!
72
The only two digit numbers whose digits add up to 17 are 89 and 98. Since 98 is an even number, 89 is prime.
The numbers are called the summands. The digits would therefore be components of the summands.
The divisibility test for the number 9 is: Any number whose digits add up to 9 or a multiple of 9, is divisible by 9. Any other number the sum of whose digits do not add up to 9 or a multiple of 9, are not divisible by 9.For example, the digits of 81 sum up to 9, and therefore, 81 is divisible by 9. The digits of the number 319381482 add up to 39, and therefore, 319381482 is divisible by 9.
The smallest prime number, of course, is 2. The smallest prime number whose digits add up to 2 is, of course, 2. The next-smallest is 11. It is left as an exercise for the reader to determine whether the other numbers whose digits add up to 2 (e.g. 101, 1001, 10001) are prime.
All numbers whose digits finally add up to 9 are divisible by 9 as for example 81 => 8+1 is 9 and so 81 is divisible by 9
There are two numbers between 740 and 760 whose digits sum to 17: 746 and 755
17
All numbers that are divisible by 6 are even numbers whose digits add up to 3 or a multiple of 3. Example : 284 is not wholly divisible by 6 as although it is even, its digits total 2 + 8 + 4 = 14 which is not divisible by 3. 282 is divisible by 6 as it is even and its digits total 12 which is divisible by 3.