Générateur de fiches — énigmes mathématiques

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Énigmes mathématiques

Nom: Date:

1.
Three consecutive numbers add to 45. What are they?
2.
Fill in the missing operator: 17 ___ 7 = 10
3.
I think of a number, multiply it by 6 and add 17. The result is 299. What was my number?
4.
Fill in the missing operator: 19 ___ 11 = 209
5.
Fill in the missing operator: 6 ___ 7 = 13
6.
Three consecutive numbers add to 108. What are they?
7.
Fill in the missing operator: 16 ___ 10 = 6
8.
Fill in the missing operator: 3 ___ 5 = 8
9.
Three consecutive numbers add to 21. What are they?
10.
I think of a number, multiply it by 5 and add 19. The result is 54. What was my number?
11.
Fill in the missing operator: 6 ___ 2 = 12
12.
Three consecutive numbers add to 15. What are they?
13.
Fill in the missing operator: 15 ___ 12 = 27
14.
Fill in the missing operator: 19 ___ 8 = 152
15.
Fill in the missing operator: 6 ___ 4 = 2
16.
Three consecutive numbers add to 45. What are they?
17.
I think of a number, multiply it by 4 and add 18. The result is 226. What was my number?
18.
I think of a number, multiply it by 2 and add 16. The result is 24. What was my number?
19.
Fill in the missing operator: 15 ___ 6 = 21
20.
Fill in the missing operator: 20 ___ 12 = 240

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Énigmes mathématiques — Corrigé

Nom: Date:

1.
Three consecutive numbers add to 45. What are they?
14, 15, 16
2.
Fill in the missing operator: 17 ___ 7 = 10
−
3.
I think of a number, multiply it by 6 and add 17. The result is 299. What was my number?
47
4.
Fill in the missing operator: 19 ___ 11 = 209
×
5.
Fill in the missing operator: 6 ___ 7 = 13
+
6.
Three consecutive numbers add to 108. What are they?
35, 36, 37
7.
Fill in the missing operator: 16 ___ 10 = 6
−
8.
Fill in the missing operator: 3 ___ 5 = 8
+
9.
Three consecutive numbers add to 21. What are they?
6, 7, 8
10.
I think of a number, multiply it by 5 and add 19. The result is 54. What was my number?
7
11.
Fill in the missing operator: 6 ___ 2 = 12
×
12.
Three consecutive numbers add to 15. What are they?
4, 5, 6
13.
Fill in the missing operator: 15 ___ 12 = 27
+
14.
Fill in the missing operator: 19 ___ 8 = 152
×
15.
Fill in the missing operator: 6 ___ 4 = 2
−
16.
Three consecutive numbers add to 45. What are they?
14, 15, 16
17.
I think of a number, multiply it by 4 and add 18. The result is 226. What was my number?
52
18.
I think of a number, multiply it by 2 and add 16. The result is 24. What was my number?
4
19.
Fill in the missing operator: 15 ___ 6 = 21
+
20.
Fill in the missing operator: 20 ___ 12 = 240
×

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