2. Find the intruder among these countries: France, Germany, Spain, Japan.

3. Repeat these numbers backwards mentally: 8 - 3 - 5 - 1.

4. If (x+1)² = 9, then x = ?

5. Find the complex sequence: 7, 15, 31, 63, ...?

6. If we unfold a perfect cube, how many faces do we get flat?

7. If 3 workers build a wall in 6 days, 1 worker takes?

8. What number follows 1, 2, 3, 4?

9. The combination C(5,2) = ?

10. A number multiplied by 3 then increased by 5 gives 20. The number is ?

11. Complete: Monday, Tuesday, Wednesday, ...?

12. Suite : 2, 3, 5, 7, 11, 13, ... ?

13. What is the average of 10, 20 and 30?

14. What number is missing: 5, 7, 11, 19, 35, ...?

15. Which is bigger: 50 or 45?

16. Sequence: 2, 4, 6, 8, ... ?

17. Suite : 1, 3, 6, 10, 15, 21, ... ?

18. How much is 15 + 12?

19. How many small cubes of 1cm side can be put in a large cube of 3cm?

20. Suite : 2, 4, 8, 16, ... ?

21. Which number completes: 7, 14, 10, 20, 16, 32, ...?

22. How many minutes are there in 2 full hours?

23. Syllogism: "All A's are B's, no B's are C's". So no A is C?

24. If 3x = 12, then x = ?

25. The opposite of hot is...?

26. How many faces does a triangular prism have?

27. If a train travels 300km in 2 hours, its average speed is?

28. What number is missing: 4, 9, 19, 39, ...?

29. If f(x) = 2x² - 3, then f(3) = ?

30. If all carons are blue and this object is a caron, what do we know for sure?

31. Logical sequence: 81, 64, 49, 36, ...?

32. What is the next number in this sequence: 2, 6, 18, 54, ...?

33. How many sides does a square have?

34. If "Monday" is associated with 1, then "Wednesday" is associated with ?

35. Memorize: Blue, Green, Yellow, Black, White. What was the 4th color?

36. Marc is 6 years old, his sister is half his age. When Marc is 50, how old will his sister be?

37. If 4 painters paint 4 houses in 4 days, 8 painters paint?

38. What complete picture ★, ●, ★, ●, ...?

39. If the word "DOG" is coded "DJIFO", how to code "CAT"?

40. How many right angles are there in total on the faces of a cube?

41. Which is NOT a metal among these elements: Gold, Silver, Copper, Glass?

42. Complete: 1, 3, 5, 7, ...?

43. If you rotate a wheel 360 degrees, its position is?

44. A 4×4×4 cube contains how many small 1×1×1 cubes?

45. If a² + b² = c², and a = 3, b = 4, then c = ?