Leah writes a number on the card. It is greater than 900 but smaller that 930. The sum of all digits is 13. How many possible numbers are there?
The digit in the hundred place is 9.
Sum of the digit in the tens place and the ones place
= 13 - 9
= 4
Hundreds |
Tens |
Ones |
9 |
0 |
4 |
9 |
1 |
3 |
9 |
2 |
2 |
9 |
3 |
1 |
The possible numbers are 904, 913, 922 and 931.
Number of possible numbers: 4
Answer(s): 4