PSLE Reggie had 10 more two-dollar notes than ten-dollar notes at first. He exchanged $170 worth of ten-dollar notes for two-dollar notes. How many more two-dollar notes than ten-dollar notes did Reggie have after the exchange?
Number |
$2 |
$10 |
Before |
1 u + 10 |
1 u |
Change |
+ 85 |
- 17 |
After |
1 u + 10 + 85 |
1 u - 17 |
Number of ten-dollar notes that Reggie exchanged into two-dollar notes
= 170 ÷ 10
= 17
Number of two-dollar notes that Reggie received from the exchange
= 170 ÷ 2
= 85
Number of more two-dollar notes than ten-dollar notes
= 10 + 85 + 17
= 112
Answer: 112