PSLE
Vanessa and Tammy each had a plate of dough of the same mass for making croissants. The same mass of dough was used for each croissant. Vanessa made 30 croissants and had 500 g of dough left. Tammy made 12 croissants and had 1.13 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 Vanessa and Tammy
= 30 - 12
= 18

1 kg = 1000 g
1.13 kg = 1.13 x 1000 = 1130 g

Difference between the remaining dough left by Tammy and Vanessa
= 1130 - 500
= 630 g

Mass of 18 croissants = 630 g

Mass of 1 croissant
= 630 ÷ 18
= 35 g

(b)
Total remaining dough left
= 1130 + 500
= 1630 g

Sets of 35 g
= 1630 ÷ 35
= 46 r 20

Number of croissants = 46

Answer(s): (a) 35 g; (b) 46