PSLE
Shiyun and Rachel each had a plate of dough of the same mass for making croissants. The same mass of dough was used for each croissant. Shiyun made 33 croissants and had 230 g of dough left. Rachel made 13 croissants and had 1.03 kg of dough left.

1. What was the mass of dough needed for each croissant?
2. With the remaining dough from both girls, how many more such croissants can be made at most? 

(a)
Difference between the number of croissants made by Shiyun and Rachel
= 33 - 13
= 20

1 kg = 1000 g
1.03 kg = 1.03 x 1000 = 1030 g

Difference between the remaining dough left by Rachel and Shiyun
= 1030 - 230
= 800 g

Mass of 20 croissants = 800 g

Mass of 1 croissant
= 800 ÷ 20
= 40 g

(b)
Total remaining dough left
= 1030 + 230
= 1260 g

Sets of 40 g
= 1260 ÷ 40
= 31 r 20

Number of croissants = 31

Answer(s): (a) 40 g; (b) 31