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Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 410 · 40 questions
TalentJR

The trick (Spot the pattern): 37 × 3 = 111, so 37 × (3 × k) is k written three times. 12345679 × 9 = 111111111, so 12345679 × (9 × k) is k written nine times. 1 × 8 + 1 = 9, 12 × 8 + 2 = 98, 123 × 8 + 3 = 987 …; and 11 × 11 = 121, 111 × 111 = 12321.

NameDateTime takenScore ___ / 40
  1. 1.12345678 × 8 + 8 =
  2. 2.12345678 × 9 + 9 =
  3. 3.12 × 9 + 3 =
  4. 4.11111 × 11111 =
  5. 5.1234567 × 9 + 8 =
  6. 6.37 × 12 =
  7. 7.123 × 8 + 3 =
  8. 8.11 × 11 =
  9. 9.37 × 21 =
  10. 10.1234567 × 8 + 7 =
  11. 11.37 × 27 =
  12. 12.12345679 × 27 =
  13. 13.12345679 × 54 =
  14. 14.37 × 6 =
  15. 15.111 × 111 =
  16. 16.37 × 9 =
  17. 17.12 × 8 + 2 =
  18. 18.12345 × 9 + 6 =
  19. 19.111111 × 111111 =
  20. 20.12345679 × 63 =
  21. 21.1234 × 9 + 5 =
  22. 22.123 × 9 + 4 =
  23. 23.12345679 × 18 =
  24. 24.12345679 × 81 =
  25. 25.12345679 × 36 =
  26. 26.1111 × 1111 =
  27. 27.123456789 × 8 + 9 =
  28. 28.123456 × 9 + 7 =
  29. 29.12345679 × 9 =
  30. 30.1234 × 8 + 4 =
  31. 31.123456 × 8 + 6 =
  32. 32.12345679 × 72 =
  33. 33.37 × 3 =
  34. 34.37 × 24 =
  35. 35.37 × 18 =
  36. 36.1111 × 1111 =
  37. 37.12345679 × 18 =
  38. 38.37 × 21 =
  39. 39.12345679 × 45 =
  40. 40.37 × 9 =

Answer key

  1. 98765432
  2. 111111111
  3. 111
  4. 123454321
  5. 11111111
  6. 444
  7. 987
  8. 121
  9. 777
  10. 9876543
  11. 999
  12. 333333333
  13. 666666666
  14. 222
  15. 12321
  16. 333
  17. 98
  18. 111111
  19. 12345654321
  20. 777777777
  21. 11111
  22. 1111
  23. 222222222
  24. 999999999
  25. 444444444
  26. 1234321
  27. 987654321
  28. 1111111
  29. 111111111
  30. 9876
  31. 987654
  32. 888888888
  33. 111
  34. 888
  35. 666
  36. 1234321
  37. 222222222
  38. 777
  39. 555555555
  40. 333

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