Ahmad has 15 notes. There are only fifty-dollar notes and one hundred-dollar notes. The total amount of money is $1050. How many one hundred-dollar notes does Ahmad have?
Number of
one hundred-dollar notes |
Value of
one hundred-dollar notes |
Number of
fifty-dollar notes |
Value of
fifty-dollar notes |
Total
value |
| 15 |
15 x 100 = $1500 |
0 |
0 |
$1500 |
| 14 |
14 x 100 = $1400 |
1 |
1 x 50
= $50 |
$1450 |
| 6 |
6 x 100 =
$600 |
9 |
9 x 50 = $450 |
$1050 |
Total amount of money if all the notes are one hundred-dollar notes
= 15 x 100
= $1500
Big difference between the amounts of one hundred-dollar notes and fifty-dollar notes
= 1500 - 1050
= $450
Small difference between amount in one one hundred-dollar note and one fifty-dollar note
= 100 - 50
= 50
Number of fifty-dollar notes
= 450 ÷ 50
= 9
Number of one hundred-dollar notes
= 15 - 9
= 6
Answer(s): 6
