GCSE Secondary Maths Age 13-17 - Number: Money - Problem - Explained

The video tutorial explains how to calculate the cost of 10 pens. It starts by determining the cost of one pen by dividing the total cost of eight pens by eight. The result is then multiplied by 10 to find the cost of 10 pens. The tutorial also covers the concept of moving decimal points when multiplying by 10 and explains the marks allocation for the problem, with one mark for the correct answer and one for the method used.

If 8 pens cost £12, what is the first step to find the cost of one pen?

• Multiply £12 by 8

• Add £12 and 8

• Subtract 8 from £12

• Divide £12 by 8

What is the cost of one pen when £12 is divided by 8?

• £1.50

• £2.00

• £1.75

• £1.25

How do you calculate the cost of 10 pens if one pen costs £1.50?

• Multiply £1.50 by 10

• Subtract £1.50 from 10

• Add £1.50 ten times

• Divide £1.50 by 10

What is the result of multiplying £1.50 by 10?

• £18.00

• £12.50

• £10.50

• £15.00

How many marks are allocated for the question, and what are they for?

• One mark for the final answer

• Three marks: one for the method, one for the final answer, and one for presentation

• Two marks: one for the method and one for the final answer

• One mark for the method