Determine all digits x (0–9) for which the three-digit number 3×5 is divisible by 3.
Note
A number is divisible by 3 if the sum of its digits is a multiple of 3: 3 + x + 5 = 8 + x must be divisible by 3, giving x = 1, 4, or 7.
Determine all digits x (0–9) for which the three-digit number 3×5 is divisible by 3.
A number is divisible by 3 if the sum of its digits is a multiple of 3: 3 + x + 5 = 8 + x must be divisible by 3, giving x = 1, 4, or 7.