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

The video tutorial discusses the concept of longevity, specifically the expectation that one in three babies born last year will live to 100 years old. It explains how to calculate the number of babies expected to reach this age using a simple ratio and division. The tutorial emphasizes the importance of identifying key information in questions and suggests using a highlighter to avoid missing crucial details. Additionally, it mentions the allocation of marks for both the final answer and the method used to arrive at it.

What is the expected life expectancy for one in three babies born last year?

• 100 years

• 110 years

• 90 years

• 80 years

If 720,000 babies were born last year, how many are expected to live to 100 years old?

• 600,000

• 480,000

• 360,000

• 240,000

What does the term 'one in three' mean in the context of life expectancy?

• One out of every three people will live to 80 years.

• One out of every three people will live to 100 years.

• One out of every three people will live to 110 years.

• One out of every three people will live to 90 years.

What is the first step in calculating the number of babies expected to live to 100 years old?

• Subtract 3 from the total number of babies.

• Add the total number of babies to 3.

• Divide the total number of babies by 3.

• Multiply the total number of babies by 3.

Why is it important to highlight key information in questions?

• To ensure you don't miss important details.

• To confuse the reader.

• To make the text look colorful.

• To make the text longer.