Prime Numbers Year 5 Multiplication and Division Learning Video Clip

Step 4: Prime Numbers Year 5 Multiplication and Division Learning Video Clip

Dec is competing in the Paralympics. Use your knowledge of prime numbers to help Dec and his competitors with their times and help the organisers with ticket sales and points.

More resources for Autumn Block 3 Step 4.

Not a member? Sign up here.

Discussion points for teachers

1. What could Dec’s time have been?
Discuss which prime numbers are between 10 and 20. This question is open-ended for the children to explore.
Various answers, for example: 11; 13; 17; 19. 

2. What could the number be?
Discuss the prime factors of numbers. Discuss factors of numbers between 40 and 50. Discuss factors of different numbers between 40 and 50. 
44 tickets (11 + 2 + 2 = 15)

3. After the rule change, how many points will each racer receive?
Discuss what each of the new rules are and how many points each racer receive, both for their position in the race and the extra points. Discuss how many extra points each athlete will be given. 

4. Are the organisers correct? Discuss who scored the most points and who scored the least.
Discuss whether the organisers would be correct in awarding the gold medal to Hamish.
No, because Dec Athlon scored the most points overall, but Hamish and Dec did score the same amount of extra points.

National Curriculum Objectives

Mathematics Year 5: (5C5a) Identify multiples and factors, including finding all factor pairs of a number, and common factors of two numbers

This resource is available to play with a Premium subscription.