1. BIDMAS – All – Disarm the Bomb – Clue Hunt
This game involves students finding the 8 characters to disarm their team’s bomb. These characters
can be found in posters placed around the classroom. Whether the calculations on the poster are
true or false, combined with the notes at the bottom of each poster, tells the student
whether a character is part of the code.
Click/Touch ‘Arm’ to start each timer. Then a chosen student/the teacher can input the characters
– in any order – and then click/touch ‘Disarm’. If this is not done in time, the bomb will explode.
The correct code is in the ‘notes’ and on the answer slides.
You can choose to use the normal 20 minute bomb – or a 10 minute bomb
for a frantic game that requires excellent teamwork! You may want to delay arming the bombs.
Delete the bomb-slides you don’t want to use.
(Clear plastic wallets around your classroom make it quick and easy to display posters.)
This game has sound!

2. Printing To print full page posters - Click:
File > Print. Enter ‘6-13’ in ‘Slides:’ or
Click on the section title to highlight all posters.
To print half-size posters -
File > Print. Select ‘Full Page Slides’, then ‘2 Slides’.

3. ARM
DISARM C H 3 B G 2 A F 1 E K 5 D J 4
DISARM THE BOMB

4. Can you find the secret code to disarm the bomb in time?
Input the code and turn
all the lights green before
disarming the bomb!
You only have 20 minutes!
ARM
DISARM
DISARM THE BOMB A B C D E F G H J K 1 2 3 4 5

5. ARM
DISARM
ARM
DISARM
DISARMED
DISARMED
ARMED!
06:25
06:20
06:30
06:05
06:35
06:10
06:15
06:55
07:00
07:05
06:00
06:50
06:45
06:40
05:35
05:10
05:15
05:05
05:00
04:50
04:55
05:20
05:25
05:45
05:50
05:40
07:10
05:30
05:55
07:30
08:50
08:55
08:45
08:40
08:30
08:35
09:00
09:05
09:25
09:30
09:20
09:15
09:10
08:25
08:20
07:35
07:40
04:45
07:25
07:20
07:45
07:50
08:10
08:15
08:05
08:00
07:55
07:15
04:20
01:25
01:30
01:20
01:15
01:05
01:10
01:35
01:40
02:00
02:05
01:55
01:50
01:45
01:00
00:55
00:10
00:15
00:05
00:00
20:00
00:20
00:25
00:45
00:50
00:40
00:35
00:30
02:10
02:15
03:50
03:55
03:45
03:40
03:30
03:35
04:00
04:05
04:30
04:35
09:35
04:15
04:10
03:25
03:20
02:35
02:40
02:30
02:25
02:20
02:45
02:50
03:10
03:15
03:05
03:00
02:55
04:40
04:25
16:35
16:40
16:30
16:25
16:15
16:20
16:45
16:50
17:15
17:25
17:10
17:05
16:55
17:00
16:10
16:05
15:20
15:25
15:15
15:10
15:00
15:05
15:30
15:35
15:55
16:00
15:50
15:45
15:40
17:30
17:35
19:15
19:20
19:10
19:05
18:55
19:00
19:25
19:30
09:40
19:55
19:50
19:45
19:35
19:40
18:50
18:45
18:00
18:05
17:55
17:50
17:40
17:45
18:10
18:15
18:35
18:40
18:30
18:25
18:20
14:55
17:20
11:30
11:35
11:25
11:20
11:10
11:15
11:40
11:45
12:10
12:15
12:05
12:00
11:50
11:55
11:05
11:00
10:15
10:20
10:10
10:05
09:55
10:00
10:25
10:30
10:50
10:55
10:45
10:40
10:35
12:20
09:45
14:05
14:10
14:00
13:50
13:40
13:45
14:15
14:20
14:45
14:50
14:40
14:35
14:25
14:30
13:35
13:30
12:45
12:50
12:40
12:35
12:25
12:30
12:55
13:00
13:20
13:25
13:15
13:10
13:05
09:50
ARMED!
06:55
07:00
06:50
06:45
06:35
06:40
07:05
07:10
07:35
07:40
07:30
07:25
07:15
07:20
06:30
06:25
05:35
05:40
05:30
05:25
05:15
05:20
05:45
05:50
06:15
06:20
06:10
06:05
05:55
06:00
07:45
07:50
09:25
09:30
05:10
09:20
09:10
09:15
09:35
09:40
10:05
10:10
10:00
09:55
09:45
09:50
09:05
09:00
08:15
08:20
08:10
08:05
07:55
08:00
08:25
08:30
08:50
08:55
08:45
08:40
08:35
10:15
00:00
01:40
01:45
01:35
01:30
01:20
01:25
01:50
01:55
02:20
02:25
02:15
02:10
02:00
02:05
01:15
01:10
00:20
00:25
00:15
00:10
10:20
00:05
00:30
00:35
01:00
01:05
00:55
00:50
00:40
00:45
02:30
02:35
04:15
04:20
04:10
04:05
03:55
04:00
04:25
04:30
04:55
05:00
04:50
04:45
04:35
04:40
03:50
03:45
03:00
03:05
02:55
02:50
02:40
02:45
03:10
03:15
03:35
03:40
03:30
03:25
03:20
05:05
19:55
16:50
16:55
16:45
16:40
10:25
16:35
17:00
17:05
17:25
17:30
17:20
17:15
17:10
16:25
16:20
15:35
15:40
15:30
15:25
15:20
15:45
15:50
16:10
16:15
16:05
16:00
15:55
17:35
17:40
19:15
19:20
19:10
19:05
18:55
19:00
19:25
19:30
19:50
20:00
19:45
19:40
19:35
18:50
18:45
18:00
18:05
17:55
17:50
17:45
18:10
18:15
18:35
18:40
18:30
18:25
18:20
15:15
16:30
12:00
12:05
11:55
11:50
11:40
11:45
12:10
12:15
12:35
12:40
12:30
12:25
12:20
11:35
15:10
10:45
10:50
10:40
10:35
10:30
10:55
11:00
11:20
11:25
11:15
11:10
11:05
12:45
11:30
14:25
14:30
14:20
14:15
14:10
14:40
14:45
15:05
12:50
15:00
14:55
14:50
14:05
14:35
13:15
13:20
13:10
13:00
12:55
14:00
13:25
13:05
13:45
13:40
13:35
13:30
13:50 A B C D E A B C D E
Yellow Bomb – 3, G, F, E, K, D, J, 4 Blue Bomb – H, B, A, E, K, D, J, 5 F G H J K F G H J K 1 2 3 4 5 1 2 3 4 5

6. ARMED! ARMED! DISARMED DISARMED A B C D E A B C D E F G H J K F G H J1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 A B C D E A B C D E
Yellow Bomb – 3, G, F, E, K, D, J, 4 Blue Bomb – H, B, A, E, K, D, J, 5 F G H J K F G H J K 1 2 3 4 5 1 2 3 4 5

7. 4×5+4−6=18
2×3+3×1=9
24−4×4+4=24
8−10÷5+6=12
BOTH TRUE: Yellow code includes 1.
BOTH TRUE: Blue code includes J.
1+ FALSE: Blue code includes B.
1+ FALSE: Yellow code includes B.

8. 42+6−10=12
52 −42=9
10−32+8=9
22÷8×10=6
BOTH TRUE: Yellow code includes D.
BOTH TRUE: Blue code includes 2.
1+ FALSE: Blue code includes 3.
1+ FALSE: Yellow code includes J.

9. 5×5+10÷2=30
2+6 2 −12=52
8−3 ×3−1=14
36 +7×2=26
BOTH TRUE: Blue code includes 5.
BOTH TRUE: Blue code includes C.
1+ FALSE: Yellow code includes 5.
1+ FALSE: Yellow code includes 3.

10. 2× =22
5×2 2 −21=79
(5×20) −15=5
9 −32×2=−15
BOTH TRUE: Blue code includes G.
BOTH TRUE: Blue code includes H.
1+ FALSE: Yellow code includes F.
1+ FALSE: Yellow code includes 1.

11. 7×6−25÷5=36
−16=0
5×3×2−15=45
32− =38
BOTH TRUE: Yellow code includes 2.
BOTH TRUE: Blue code includes 2.
1+ FALSE: Blue code includes E.
1+ FALSE: Yellow code includes 4.

12. 4×(3+6)÷12=3
33 −(4+2×3)=1
3× =36
10−3 +9 ÷4=5
BOTH TRUE: Yellow code includes 5.
BOTH TRUE: Blue code includes F.
1+ FALSE: Blue code includes A.
1+ FALSE: Yellow code includes G.

13. (32+7) ×5=20
5+4×12−18=35
( )2=9
19−15 3 ×2=128
BOTH TRUE: Yellow code includes E.
BOTH TRUE: Yellow code includes K.
1+ FALSE: Blue code includes F.
1+ FALSE: Blue code includes 1.

14. ×3=24
5−10 2 =25
36 ÷ 12−6 =6
×12=36
BOTH TRUE: Blue code includes K.
BOTH TRUE: Blue code includes D.
1+ FALSE: Yellow code includes 1.
1+ FALSE: Yellow code includes 2.

15. False True 4×5+4−6=18 2×3+3×1=9 24−4×4+4=24 8−10÷5+6=12
BOTH TRUE: Yellow code includes 1.
BOTH TRUE: Blue code includes J.
1+ FALSE: Blue code includes B.
1+ FALSE: Yellow code includes B.

16. True False 42+6−10=12 52 −42=9 10−32+8=9 23÷8×10=6
BOTH TRUE: Yellow code includes D.
BOTH TRUE: Blue code includes 2.
1+ FALSE: Blue code includes 3.
1+ FALSE: Yellow code includes J.

17. True False 5×5+10÷2=30 2+6 2 −12=52 8−3 ×3−1=14 36 +7×2=26
BOTH TRUE: Blue code includes 5.
BOTH TRUE: Blue code includes C.
1+ FALSE: Yellow code includes 5.
1+ FALSE: Yellow code includes 3.

18. False True 2× 49 +8=22 5×2 2 −21=79 (5×20) −15=5 9 −32×2=−15
2× =22
5×2 2 −21=79
(5×20) −15=5
9 −32×2=−15
False
True
BOTH TRUE: Blue code includes G.
BOTH TRUE: Blue code includes H.
1+ FALSE: Yellow code includes F.
1+ FALSE: Yellow code includes 1.

19. False False 7×6−25÷5=36 12+3 2 −16=0 5×3×2−15=45 32− 81 +42=38
32− =38
False
False
BOTH TRUE: Yellow code includes 2.
BOTH TRUE: Blue code includes 2.
1+ FALSE: Blue code includes E.
1+ FALSE: Yellow code includes 4.

20. False False 4×(3+6)÷12=3 3× 64 +12=36 33 −(4+2×3)=1 10−3 +9 ÷4=5
3× =36
10−3 +9 ÷4=5
False
False
BOTH TRUE: Yellow code includes 5.
BOTH TRUE: Blue code includes F.
1+ FALSE: Blue code includes A.
1+ FALSE: Yellow code includes G.

21. True True (32+7) ×5=20 ( 1 + 4 )2=9 5+4×12−18=35 19−15 3 ×2=128
( )2=9
19−15 3 ×2=128
True
True
BOTH TRUE: Yellow code includes E.
BOTH TRUE: Yellow code includes K.
1+ FALSE: Blue code includes F.
1+ FALSE: Blue code includes 1.

22. ×3=24
5−10 2 =25
36 ÷ 12−6 =6
×12=36
True
True
BOTH TRUE: Blue code includes K.
BOTH TRUE: Blue code includes D.
1+ FALSE: Yellow code includes 1.
1+ FALSE: Yellow code includes 2.

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