Joseph writes a number on the card. It is greater than 100 but smaller that 130. The sum of all digits is 5. How many possible numbers are there?
The digit in the hundred place is 1.
Sum of the digit in the tens place and the ones place
= 5 - 1
= 4
Hundreds |
Tens |
Ones |
1 |
0 |
4 |
1 |
1 |
3 |
1 |
2 |
2 |
1 |
3 |
1 |
The possible numbers are 104, 113, 122 and 131.
Number of possible numbers: 4
Answer(s): 4