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Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 418 · 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. 1.1234 × 8 + 4 =
  2. 2.1234567 × 8 + 7 =
  3. 3.1234 × 9 + 5 =
  4. 4.12345679 × 27 =
  5. 5.37 × 3 =
  6. 6.12345679 × 72 =
  7. 7.111 × 111 =
  8. 8.12345679 × 81 =
  9. 9.12345 × 9 + 6 =
  10. 10.11111 × 11111 =
  11. 11.37 × 27 =
  12. 12.12 × 9 + 3 =
  13. 13.37 × 9 =
  14. 14.12345679 × 36 =
  15. 15.123 × 9 + 4 =
  16. 16.12 × 8 + 2 =
  17. 17.12345679 × 18 =
  18. 18.37 × 21 =
  19. 19.123 × 8 + 3 =
  20. 20.37 × 6 =
  21. 21.123456 × 8 + 6 =
  22. 22.111111 × 111111 =
  23. 23.1111 × 1111 =
  24. 24.1234567 × 9 + 8 =
  25. 25.12345679 × 54 =
  26. 26.12345678 × 8 + 8 =
  27. 27.12345679 × 18 =
  28. 28.37 × 12 =
  29. 29.12345679 × 9 =
  30. 30.123456 × 9 + 7 =
  31. 31.37 × 15 =
  32. 32.12345678 × 9 + 9 =
  33. 33.12345 × 8 + 5 =
  34. 34.37 × 24 =
  35. 35.12345679 × 45 =
  36. 36.11 × 11 =
  37. 37.12345679 × 63 =
  38. 38.12345679 × 27 =
  39. 39.12345679 × 54 =
  40. 40.37 × 15 =

Answer key

  1. 9876
  2. 9876543
  3. 11111
  4. 333333333
  5. 111
  6. 888888888
  7. 12321
  8. 999999999
  9. 111111
  10. 123454321
  11. 999
  12. 111
  13. 333
  14. 444444444
  15. 1111
  16. 98
  17. 222222222
  18. 777
  19. 987
  20. 222
  21. 987654
  22. 12345654321
  23. 1234321
  24. 11111111
  25. 666666666
  26. 98765432
  27. 222222222
  28. 444
  29. 111111111
  30. 1111111
  31. 555
  32. 111111111
  33. 98765
  34. 888
  35. 555555555
  36. 121
  37. 777777777
  38. 333333333
  39. 666666666
  40. 555

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