Sarah bought 31 mangoes and 16 chikoos on Wednesday. Each day, she ate 4 mangoes and 1 chikoo. She started eating her fruits on Thursday.

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

	Mangoes	Chikoos
Before	31	16
Change	- 4 u	- 1 u
After	31 - 4 u	16 - 1 u

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

The number of chikoos and mangoes in the end is equal.

31 - 4 u = 16 - 1 u
4 u - 1 u = 31 - 16
3 u = 15

1 u = 15 ÷ 3 = 5

Sarah ate for 5 days from Thursday onwards.  At the end of Monday, there would be an equal number of mangoes and chikoos left.

(b)
Number of days from Thursday to Tuesday = 6

Number of mangoes left on Tuesday
= 31 - (4 x 6)
= 31 - 24
= 7

Number of chikoos left on Tuesday
= 16 - (1 x 6)
= 16 - 6
= 10

Number of chikoos more than mangoes
= 10 - 7
= 3

Answer(s): (a) Monday; (b) 3