Ethan writes a number on the card. It is greater than 400 but smaller that 430. The sum of all digits is 8. How many possible numbers are there?
The digit in the hundred place is 4.
Sum of the digit in the tens place and the ones place
= 8 - 4
= 4
Hundreds |
Tens |
Ones |
4 |
0 |
4 |
4 |
1 |
3 |
4 |
2 |
2 |
The possible numbers are 404, 413 and 422.
Number of possible numbers: 3
Answer(s): 3