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Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 562 · 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. 2.37 × 24 =
  3. 3.1234567 × 9 + 8 =
  4. 4.37 × 3 =
  5. 5.1234 × 8 + 4 =
  6. 6.12345679 × 9 =
  7. 7.111111 × 111111 =
  8. 8.123 × 8 + 3 =
  9. 9.123456789 × 8 + 9 =
  10. 10.11 × 11 =
  11. 11.1234567 × 8 + 7 =
  12. 12.12345678 × 9 + 9 =
  13. 13.111111 × 111111 =
  14. 14.37 × 15 =
  15. 15.123456 × 9 + 7 =
  16. 16.12345 × 8 + 5 =
  17. 17.37 × 21 =
  18. 18.37 × 9 =
  19. 19.12345679 × 27 =
  20. 20.123456 × 8 + 6 =
  21. 21.12345679 × 63 =
  22. 22.12345679 × 72 =
  23. 23.1234 × 9 + 5 =
  24. 24.37 × 27 =
  25. 25.12345679 × 36 =
  26. 26.1111 × 1111 =
  27. 27.11111 × 11111 =
  28. 28.37 × 6 =
  29. 29.111 × 111 =
  30. 30.37 × 12 =
  31. 31.12345679 × 18 =
  32. 32.123 × 9 + 4 =
  33. 33.12345 × 9 + 6 =
  34. 34.12345679 × 45 =
  35. 35.12 × 9 + 3 =
  36. 36.37 × 18 =
  37. 37.12345679 × 54 =
  38. 38.12 × 8 + 2 =
  39. 39.12345 × 8 + 5 =
  40. 40.1234 × 9 + 5 =

Answer key

  1. 98765432
  2. 888
  3. 11111111
  4. 111
  5. 9876
  6. 111111111
  7. 12345654321
  8. 987
  9. 987654321
  10. 121
  11. 9876543
  12. 111111111
  13. 12345654321
  14. 555
  15. 1111111
  16. 98765
  17. 777
  18. 333
  19. 333333333
  20. 987654
  21. 777777777
  22. 888888888
  23. 11111
  24. 999
  25. 444444444
  26. 1234321
  27. 123454321
  28. 222
  29. 12321
  30. 444
  31. 222222222
  32. 1111
  33. 111111
  34. 555555555
  35. 111
  36. 666
  37. 666666666
  38. 98
  39. 98765
  40. 11111

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