PSLE
Natalie and Fiona each had a plate of dough of the same mass for making muffins. The same mass of dough was used for each muffin. Natalie made 41 muffins and had 470 g of dough left. Fiona made 23 muffins and had 1.01 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 Natalie and Fiona
= 41 - 23
= 18

1 kg = 1000 g
1.01 kg = 1.01 x 1000 = 1010 g

Difference between the remaining dough left by Fiona and Natalie
= 1010 - 470
= 540 g

Mass of 18 muffins = 540 g

Mass of 1 muffin
= 540 ÷ 18
= 30 g

(b)
Total remaining dough left
= 1010 + 470
= 1480 g

Sets of 30 g
= 1480 ÷ 30
= 49 r 10

Number of muffins = 49

Answer(s): (a) 30 g; (b) 49