A lucky integer is a positive integer which is divisible by the sum of its digits. How many numbers from 1 to 50 are lucky?
10 , 12 , 18 , 20 , 21 , 24 , 27 , 30 , 36 , 40 , 42 , 45 , 48 , 50>> Total = 14 such numbers
Mmmm...let's see ( I'm not sure myself !!!)
The first 9 positive integers are all divisible by their sum
Then 10, 12, 18, 20, 21, 24, 27, 30, 36, 40, 42, 45, 48, 50
I get 23 !!!
Guest is probably correct......I don't know if we can consider single digits as having a sum !!!
