write all possible 3 digit numbers the sum of whose digits is 4.

write all possible 3 digit numbers the sum of whose digits is 4.

Here is all possible 3 digit numbers the sum of whose digits is 4 are as following, 103,112,220 and 400.

Explanation:

(1+ 0 + 3 = 4) = 103

(1+1+2=4) = 112

(2+2+0=4) = 220

(4+0+0=4) = 400