1. HCF & LCM – Prime Factorisation – Card Match
In this activity students work individually or in groups to
match questions and answers.
Instead of cutting out cards, students can letter questions and
answers that go together.

2. Printing To print handouts from slides -
Select the slide from the left. Then click:
File > Print > ‘Print Current Slide’
To print multiple slides -
Click on a section title to highlight all those slides,
or press ‘Ctrl’ at the same time as selecting slides to
highlight more than one. Then click:
File > Print > ‘Print Selection’
To print double-sided handouts -
Highlight both slides before using ‘Print Selection’.
Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

3. 24 & 16
LCM = 45
HCF = 4
9 & 15
LCM = 72
HCF = 8
24 & 56
LCM = 112
21 & 14
LCM = 75
28 & 16
LCM = 108
HCF = 12
25 & 15
LCM = 48
HCF = 18
40 & 24
LCM = 160
HCF = 3
24 & 36
LCM = 42
HCF = 5
32 & 40
LCM = 168
54 & 36
LCM = 120
HCF = 7

4. Half Answers 24 & 16 LCM = 48 9 & 15 LCM = 45 24 & 56 LCM = 168
21 & 14
LCM = 42
28 & 16
LCM = 112
25 & 15
HCF = 5
40 & 24
HCF = 8
24 & 36
HCF = 12
32 & 40
54 & 36
HCF = 18
Half
Answers

5. Answers 24 & 16 LCM = 48 HCF = 8 9 & 15 LCM = 45 HCF = 3 24 & 56
21 & 14
LCM = 42
HCF = 7
28 & 16
LCM = 112
HCF = 4
25 & 15
LCM = 75
HCF = 5
40 & 24
LCM = 120
24 & 36
LCM = 72
HCF = 12
32 & 40
LCM = 160
54 & 36
LCM = 108
HCF = 18
Answers

6. 24 & 16
LCM = 45
HCF = 4
9 & 15
LCM = 72
HCF = 8
24 & 56
LCM = 112
21 & 14
LCM = 75
28 & 16
LCM = 108
HCF = 12
25 & 15
LCM = 48
HCF = 18
40 & 24
LCM = 160
HCF = 3
24 & 36
LCM = 42
HCF = 5
32 & 40
LCM = 168
54 & 36
LCM = 120
HCF = 7
24 & 16
LCM = 45
HCF = 4
9 & 15
LCM = 72
HCF = 8
24 & 56
LCM = 112
21 & 14
LCM = 75
28 & 16
LCM = 108
HCF = 12
25 & 15
LCM = 48
HCF = 18
40 & 24
LCM = 160
HCF = 3
24 & 36
LCM = 42
HCF = 5
32 & 40
LCM = 168
54 & 36
LCM = 120
HCF = 7

8. tom@goteachmaths.co.uk Questions? Comments? Suggestions?
…or have you found a mistake!?
Any feedback would be appreciated .
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