Cathy bought 23 persimmons and 11 oranges on Monday. Each day, she ate 5 persimmons and 1 orange. She started eating her fruits on Tuesday.

1. At the end of which day would there be an equal number of persimmons and oranges left? Give your answer in the following format. (Eg Monday)
2. How many more oranges than persimmons were there on Friday?

	Persimmons	Oranges
Before	23	11
Change	- 5 u	- 1 u
After	23 - 5 u	11 - 1 u

(a)
Let the number of days be 1 u.

The number of oranges and persimmons in the end is equal.

23 - 5 u = 11 - 1 u
5 u - 1 u = 23 - 11
4 u = 12

1 u = 12 ÷ 4 = 3

Cathy ate for 3 days from Tuesday onwards.  At the end of Thursday, there would be an equal number of persimmons and oranges left.

(b)
Number of days from Tuesday to Friday = 4

Number of persimmons left on Friday
= 23 - (5 x 4)
= 23 - 20
= 3

Number of oranges left on Friday
= 11 - (1 x 4)
= 11 - 4
= 7

Number of oranges more than persimmons
= 7 - 3
= 4

Answer(s): (a) Thursday; (b) 4