PSLE Valen had 13 more one-dollar notes than ten-dollar notes at first. He exchanged $150 worth of ten-dollar notes for one-dollar notes. How many more one-dollar notes than ten-dollar notes did Valen have after the exchange?
Number |
$1 |
$10 |
Before |
1 u + 13 |
1 u |
Change |
+ 150 |
- 15 |
After |
1 u + 13 + 150 |
1 u - 15 |
Number of ten-dollar notes that Valen exchanged into one-dollar notes
= 150 ÷ 10
= 15
Number of one-dollar notes that Valen received from the exchange
= 150 ÷ 1
= 150
Number of more one-dollar notes than ten-dollar notes
= 13 + 150 + 15
= 178
Answer: 178