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.
13
3 is a Prime number, which means it can only be multiplied by itself or by 1. 1x3 =3, or 3x1 is 3. The number 3 adds to be 6 twice; 2 x 3 = 6.
3 is a prime number, which means it can only be multiplied by itself or by 1. 1x3 =3, or 3x1 is 3. The number 3 adds to be 6 twice; 2 x 3 = 6.
Any number adds to 15.
23 :]
44
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.
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13
199 and 11
If the digit sum of a number adds up to 9 then it is divisible by 9.
3619
3 is a Prime number, which means it can only be multiplied by itself or by 1. 1x3 =3, or 3x1 is 3. The number 3 adds to be 6 twice; 2 x 3 = 6.
3 is a prime number, which means it can only be multiplied by itself or by 1. 1x3 =3, or 3x1 is 3. The number 3 adds to be 6 twice; 2 x 3 = 6.
Hundreds place
The only prime number with two digits whose digits sum to 14 is 59. To determine this, we can list out the prime numbers with two digits (from 10 to 99) and check which one has digits that sum up to 14. The only number that satisfies this condition and is also a prime number is 59.