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Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 25 · 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. 1.1234567 × 8 + 7 =
  2. 2.12345679 × 81 =
  3. 3.37 × 3 =
  4. 4.37 × 6 =
  5. 5.12345679 × 27 =
  6. 6.12 × 8 + 2 =
  7. 7.37 × 27 =
  8. 8.123456 × 9 + 7 =
  9. 9.123 × 8 + 3 =
  10. 10.123 × 9 + 4 =
  11. 11.1234567 × 9 + 8 =
  12. 12.12345679 × 9 =
  13. 13.1111 × 1111 =
  14. 14.12345 × 8 + 5 =
  15. 15.37 × 12 =
  16. 16.11 × 11 =
  17. 17.12345679 × 36 =
  18. 18.12 × 9 + 3 =
  19. 19.11111 × 11111 =
  20. 20.12345678 × 8 + 8 =
  21. 21.12345679 × 45 =
  22. 22.12345678 × 9 + 9 =
  23. 23.12345679 × 54 =
  24. 24.123456 × 8 + 6 =
  25. 25.123456789 × 8 + 9 =
  26. 26.1234 × 8 + 4 =
  27. 27.12345 × 9 + 6 =
  28. 28.37 × 24 =
  29. 29.37 × 18 =
  30. 30.12345679 × 63 =
  31. 31.37 × 9 =
  32. 32.1234 × 9 + 5 =
  33. 33.111111 × 111111 =
  34. 34.12345679 × 18 =
  35. 35.37 × 21 =
  36. 36.37 × 9 =
  37. 37.37 × 9 =
  38. 38.123456789 × 8 + 9 =
  39. 39.111 × 111 =
  40. 40.12345679 × 72 =

Answer key

  1. 9876543
  2. 999999999
  3. 111
  4. 222
  5. 333333333
  6. 98
  7. 999
  8. 1111111
  9. 987
  10. 1111
  11. 11111111
  12. 111111111
  13. 1234321
  14. 98765
  15. 444
  16. 121
  17. 444444444
  18. 111
  19. 123454321
  20. 98765432
  21. 555555555
  22. 111111111
  23. 666666666
  24. 987654
  25. 987654321
  26. 9876
  27. 111111
  28. 888
  29. 666
  30. 777777777
  31. 333
  32. 11111
  33. 12345654321
  34. 222222222
  35. 777
  36. 333
  37. 333
  38. 987654321
  39. 12321
  40. 888888888

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