Yoko bought 19 apples and 9 lemons on Saturday. Each day, she ate 3 apples and 1 lemon. She started eating her fruits on Sunday.
- At the end of which day would there be an equal number of apples and lemons left? Give your answer in the following format. (Eg Monday)
- How many more lemons than apples were there on Friday?
| |
Apples |
Lemons |
| Before |
19 |
9 |
| Change |
- 3 u |
- 1 u |
| After |
19 - 3 u |
9 - 1 u |
(a)
Let the number of days be 1 u.
The number of lemons and apples in the end is equal.
19 - 3 u = 9 - 1 u
3 u - 1 u = 19 - 9
2 u = 10
1 u = 10 ÷ 2 = 5
Yoko ate for 5 days from Sunday onwards. At the end of Thursday, there would be an equal number of apples and lemons left.
(b)
Number of days from Sunday to Friday = 6
Number of apples left on Friday
= 19 - (3 x 6)
= 19 - 18
= 1
Number of lemons left on Friday
= 9 - (1 x 6)
= 9 - 6
= 3
Number of lemons more than apples
= 3 - 1
= 2
Answer(s): (a) Thursday; (b) 2
