Problem #103
Sevens and Threes
Find the sum of all 7 digit numbers which satisfy the following conditions :
1. It contains only digits 3 and 7.
2. The number is divisible by 7.
3. Last digit of number is 3.
Find the sum of all 7 digit numbers which satisfy the following conditions :
1. It contains only digits 3 and 7.
2. The number is divisible by 7.
3. Last digit of number is 3.