No credit is to be given on any line unless all of the missing numbers are correctly supplied. The score is the number of lines completed correctly in every detail.

6Series1
1420Series2
965Series3
519Series4
4127Series5
1049Series6
14Series7
2250Series8
1125Series9
101410Series10
8161719Series11
13649Series12
2343774Series13
33303124Series14
1516166Series15
51484551Series16

MENTIMETER NO. 10: Addition Tests

Test A: Addition Knowledge or Power.

1. 5 2. 8 3. 17 4. 79 5. 56 6. 88 7. 142 8. 248 9. 1397 10. 1664 11. 5571 12. 50362547

Test B: Addition Speed

1. 6 2. 17 3. 6 4. 11 5. 6 6. 11 7. 3 8. 9 9. 15 10. 10 11. 13 12. 7 13. 10 14. 7 15. 3 16. 5 17. 16 18. 4 19. 12 20. 11 21. 13 22. 7 23. 8 24. 13 25. 14 26. 6 27. 11 28. 8 29. 12 30. 13 31. 15 32. 18 33. 5 34. 13 35. 13 36. 14 37. 10 38. 15 39. 15 40. 12 41. 11 42. 14 43. 11 44. 11 45. 16 46. 11 47. 15 48. 12 49. 9 50. 14 51. 4 52. 9 53. 5 54. 17 55. 11 56. 7 57. 7 58. 9 59. 13 60. 12

MENTIMETER NO. 11: Memory for Numbers.

1. 56 2. 27 3. 935 4. 416 5. 7493 6. 4857 7. 95738 8. 68124 9. 268359 10. 635927 11. 9583624 12. 8195263 13. 35268349 14. 28593614 15. 639481725 16. 714963528

MENTIMETER NO. 12: Repeating Numbers Backward.