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Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 891 · 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. 1.12345 × 9 + 6 =
  2. 2.111111 × 111111 =
  3. 3.37 × 27 =
  4. 4.12345678 × 9 + 9 =
  5. 5.123 × 8 + 3 =
  6. 6.1234 × 8 + 4 =
  7. 7.11 × 11 =
  8. 8.123456 × 8 + 6 =
  9. 9.12345679 × 18 =
  10. 10.37 × 24 =
  11. 11.37 × 21 =
  12. 12.12345679 × 36 =
  13. 13.1234567 × 9 + 8 =
  14. 14.37 × 12 =
  15. 15.12345679 × 81 =
  16. 16.1111 × 1111 =
  17. 17.37 × 3 =
  18. 18.12 × 8 + 2 =
  19. 19.12345679 × 54 =
  20. 20.12345679 × 45 =
  21. 21.12345679 × 72 =
  22. 22.12 × 9 + 3 =
  23. 23.123456 × 9 + 7 =
  24. 24.1234567 × 8 + 7 =
  25. 25.37 × 9 =
  26. 26.12345678 × 8 + 8 =
  27. 27.37 × 6 =
  28. 28.11111 × 11111 =
  29. 29.111 × 111 =
  30. 30.37 × 18 =
  31. 31.123 × 9 + 4 =
  32. 32.12345679 × 27 =
  33. 33.12345 × 8 + 5 =
  34. 34.1234567 × 9 + 8 =
  35. 35.12345679 × 9 =
  36. 36.12345678 × 9 + 9 =
  37. 37.37 × 15 =
  38. 38.12345679 × 18 =
  39. 39.123456789 × 8 + 9 =
  40. 40.12345679 × 63 =

Answer key

  1. 111111
  2. 12345654321
  3. 999
  4. 111111111
  5. 987
  6. 9876
  7. 121
  8. 987654
  9. 222222222
  10. 888
  11. 777
  12. 444444444
  13. 11111111
  14. 444
  15. 999999999
  16. 1234321
  17. 111
  18. 98
  19. 666666666
  20. 555555555
  21. 888888888
  22. 111
  23. 1111111
  24. 9876543
  25. 333
  26. 98765432
  27. 222
  28. 123454321
  29. 12321
  30. 666
  31. 1111
  32. 333333333
  33. 98765
  34. 11111111
  35. 111111111
  36. 111111111
  37. 555
  38. 222222222
  39. 987654321
  40. 777777777

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