PSLE
Esther and Linda each had a plate of dough of the same mass for making croissants. The same mass of dough was used for each croissant. Esther made 31 croissants and had 415 g of dough left. Linda made 11 croissants and had 1.115 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 Esther and Linda
= 31 - 11
= 20

1 kg = 1000 g
1.115 kg = 1.115 x 1000 = 1115 g

Difference between the remaining dough left by Linda and Esther
= 1115 - 415
= 700 g

Mass of 20 croissants = 700 g

Mass of 1 croissant
= 700 ÷ 20
= 35 g

(b)
Total remaining dough left
= 1115 + 415
= 1530 g

Sets of 35 g
= 1530 ÷ 35
= 43 r 25

Number of croissants = 43

Answer(s): (a) 35 g; (b) 43