PSLE
Pamela and Roshel each had a plate of dough of the same mass for making muffins. The same mass of dough was used for each muffin. Pamela made 33 muffins and had 465 g of dough left. Roshel made 13 muffins and had 1.365 kg of dough left.

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

(a)
Difference between the number of muffins made by Pamela and Roshel
= 33 - 13
= 20

1 kg = 1000 g
1.365 kg = 1.365 x 1000 = 1365 g

Difference between the remaining dough left by Roshel and Pamela
= 1365 - 465
= 900 g

Mass of 20 muffins = 900 g

Mass of 1 muffin
= 900 ÷ 20
= 45 g

(b)
Total remaining dough left
= 1365 + 465
= 1830 g

Sets of 45 g
= 1830 ÷ 45
= 40 r 30

Number of muffins = 40

Answer(s): (a) 45 g; (b) 40