1. HCF & LCM – Listing – Blockbusters
In this activity, a red and blue team compete to link their sides of the game board.
Click/Touch a letter hexagon to go to the corresponding question.
Click the ‘Answer’ box for the answer and again to return to the game board.
Click the colour of the team to claim that hexagon for them.
When a team completes the link, click either the red or blue star
in the bottom-right corner for a winning animation.
This game has sound!

2. This game is flexible and can be run in a variety of ways:
Teams could choose questions individually, with the opportunity for
the other team to ‘steal’ if their answer is incorrect.
A whole team may complete a question with one student
being chosen to provide an answer.
Individual students from each team may compete
simultaneously for a quickest answer.
Red/Blue team students can be paired. The teacher can then either assess
which majority of a team got their answer correct fastest (using mini-whiteboards)
or poll the class as to how many red/blue team members won within each pair, and therefore determine the overall winning team.

3. B L O C K J U Q A I W S T X P H D N E M V G L R S

4. H A Q S F E L I G N U P B Z C W Y D V M R T O X K

5. Find the Lowest Common Multiple of:
4 & 6 12
Answer

6. Find the Highest Common Factor of:
10 & 8 2
Answer

7. Find the Lowest Common Multiple of:
5 & 7 35
Answer

8. Find the Highest Common Factor of:
15 & 9 3
Answer

9. Find the Highest Common Factor of:
25 & 20 5
Answer

10. Find the Highest Common Factor of:
30 & 15 15
Answer

11. Find the Highest Common Factor of:
35 & 14 7
Answer

12. Find the Lowest Common Multiple of:
12 & 8 24
Answer

13. Find the Highest Common Factor of:
45 & 30 15
Answer

14. Find the Highest Common Factor of:
24 & 32 8
Answer

15. Find the Lowest Common Multiple of:
6 & 8 24
Answer

16. Find the Lowest Common Multiple of:
10 & 15 30
Answer

17. Find the Highest Common Factor of:
24 & 16 8
Answer

18. Find the Highest Common Factor of:
50 & 20 10
Answer

19. Find the Lowest Common Multiple of:
15 & 45 45
Answer

20. Find the Lowest Common Multiple of:
20 & 30 60
Answer

21. Find the Lowest Common Multiple of:
4 & 5 20
Answer

22. Find the Highest Common Factor of:
32 & 12 4
Answer

23. Find the Lowest Common Multiple of:
20 & 6 60
Answer

24. Find the Lowest Common Multiple of:
6 & 9 18
Answer

25. Find the Highest Common Factor of:
36 & 27 9
Answer

26. Find the Highest Common Factor of:
21 & 49 7
Answer

27. Find the Highest Common Factor of:
12 & 30 6
Answer

28. Find the Lowest Common Multiple of:
9 & 7 63
Answer

29. Find the Highest Common Factor of:
27 & 39 3
Answer

30. tom@goteachmaths.co.uk Questions? Comments? Suggestions?
…or have you found a mistake!?
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