Uploaded by Naim Rahman

# HCF-LCM-Prime-Factorisation-Bingo-OA

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```HCF &amp; LCM – Prime Factorisation – Bingo Only Answers
Students should choose nine answers from the grid and place them
randomly into a 3x3 square in their book.
You may want to pause your display and choose questions
according to difficulty during the game.
Depending on time, students could win with
a line, an X, or a ‘full house’ (all).
Printing
To print handouts from slides Select the slide from the left. Then click:
File &gt; Print &gt; ‘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 &gt; Print &gt; ‘Print Selection’
To print double-sided handouts Highlight both slides before using ‘Print Selection’.
Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.
45 54 23
82 37 12
76 25 91
1800
6
45
15
18
216
1
180
25
30
12
4158
120
2100
8100
54
Draw a 3x3 grid in your book.
A = 2 &times; 3 &times; 52
B=2&times;
2
3
Find the Highest Common Factor of A &amp; B
2&times;3=6
A = 2 2 &times; 32 &times; 32 &times; 5 2
B=
2
2
&times;3
Find the HCF of A &amp; B
22 &times; 3 = 12
A = 2 2 &times; 32 &times; 5
B=2&times;
2
3
Find the Lowest Common Multiple of A &amp; B
22 &times; 32 &times; 5 = 180
A = 22 &times; 3
B=
3
2
&times;5
Find the LCM of A &amp; B
23 &times; 3 &times; 5 = 120
A = 3 2 &times; 52
B=
2
2
&times;
2
3
&times;5
Find the Highest Common Factor of A &amp; B
32 &times; 5 = 45
A = 2 &times; 52
B=
3
3
&times;7
Find the Highest Common Factor of A &amp; B
1
A = 2 2 &times; 32
B=2&times;
2
3
C = 2 &times; 32 &times; 5
Find the Highest Common Factor of A &amp; B &amp; C
2 &times; 32 = 18
A = 2 &times; 3 &times; 52 &times; 7
B=
2
2
&times;3&times;7
Find the LCM of A &amp; B
22 &times; 3 &times; 52 &times; 7 = 2100
A = 53 &times; 73 &times; 13
B=
2
2
&times;3&times;
2
5
Find the Highest Common Factor of A &amp; B
52 = 25
A = 32 &times; 5
B=
2
2
&times;3&times;
2
5
C = 3 &times; 52 &times; 7
Find the Highest Common Factor of A &amp; B &amp; C
3 &times; 5 = 15
A = 2 &times; 33 &times; 11
B=2&times;
2
3
&times;7
Find the Lowest Common Multiple of A &amp; B
2 &times; 33 &times; 7 &times; 11 = 4158
A = 2 2 &times; 33
B=
3
2
&times;
2
3
Find the LCM of A &amp; B
23 &times; 33 = 216
A = 22 &times; 3 &times; 5
B=
3
2
&times;
2
3
C = 2 &times; 32 &times; 52
Find the LCM of A &amp; B &amp; C
23 &times; 32 &times; 52 = 1800
A = 2 &times; 3 &times; 52 &times; 72
B=
3
2
&times;
3
3
&times;5
Find the HCF of A &amp; B
2 &times; 3 &times; 5 = 30
A = 2 &times; 33 &times; 5
B=
3
2
&times;
4
3
&times;
3
5
C = 22 &times; 33
Find the Highest Common Factor of A &amp; B &amp; C
2 &times; 33 = 54
A = 3 2 &times; 52
B=
4
3
C = 22 &times; 3
Find the Lowest Common Multiple of A &amp; B &amp; C
22 &times; 34 &times; 52 = 8100
Questions?
Comments?
Suggestions?
…or have you found a mistake!?
Any feedback would be appreciated .
Please feel free to email:
tom@goteachmaths.co.uk
```