GCSE Secondary Maths Age 13-17 - Number: Multiplying and Dividing with Decimals - Explained

The video tutorial explains how to calculate the maximum number of biscuits Lucas can make with given ingredients. It details the calculations for each ingredient: butter, caster sugar, plain flour, and chocolate chips. The tutorial emphasizes the importance of not rounding off numbers during calculations to ensure accuracy. Ultimately, the limiting factor is the chocolate chips, allowing Lucas to make 90 biscuits. The video also discusses the allocation of marks for the problem and advises practicing similar questions.

What are the ingredients needed to make 30 biscuits?

• 225 grams of butter, 110 grams of caster sugar, 275 grams of plain flour, 75 grams of chocolate chips

• 200 grams of butter, 100 grams of caster sugar, 250 grams of plain flour, 70 grams of chocolate chips

• 250 grams of butter, 120 grams of caster sugar, 280 grams of plain flour, 80 grams of chocolate chips

• 230 grams of butter, 115 grams of caster sugar, 270 grams of plain flour, 85 grams of chocolate chips

How many biscuits can Lucas make with 900 grams of butter?

• 180 biscuits

• 150 biscuits

• 120 biscuits

• 90 biscuits

Using 1000 grams of caster sugar, how many biscuits can Lucas make?

• 272 biscuits

• 280 biscuits

• 270 biscuits

• 260 biscuits

With 1000 grams of plain flour, how many biscuits can Lucas produce?

• 130 biscuits

• 120 biscuits

• 110 biscuits

• 100 biscuits

How many biscuits can Lucas make with 225 grams of chocolate chips?

• 90 biscuits

• 70 biscuits

• 60 biscuits

• 80 biscuits

What is the maximum number of biscuits Lucas can make with the available ingredients?

• 90 biscuits

• 109 biscuits

• 272 biscuits

• 120 biscuits

Why is it important not to round off numbers in these calculations?

• Rounding is not allowed in exams.

• It makes the calculations easier.

• It saves time.

• Rounding can lead to incorrect final decisions.