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Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 936 · 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 × 8 + 5 =
  2. 2.123456 × 8 + 6 =
  3. 3.37 × 9 =
  4. 4.11111 × 11111 =
  5. 5.12345678 × 9 + 9 =
  6. 6.37 × 12 =
  7. 7.12345679 × 72 =
  8. 8.12345679 × 9 =
  9. 9.111 × 111 =
  10. 10.123 × 8 + 3 =
  11. 11.37 × 18 =
  12. 12.37 × 24 =
  13. 13.37 × 21 =
  14. 14.37 × 15 =
  15. 15.37 × 6 =
  16. 16.123 × 9 + 4 =
  17. 17.12345679 × 63 =
  18. 18.11 × 11 =
  19. 19.12345679 × 81 =
  20. 20.12345678 × 8 + 8 =
  21. 21.1234 × 9 + 5 =
  22. 22.12345679 × 36 =
  23. 23.123456 × 9 + 7 =
  24. 24.111111 × 111111 =
  25. 25.12345679 × 27 =
  26. 26.1234567 × 8 + 7 =
  27. 27.12345679 × 18 =
  28. 28.12 × 9 + 3 =
  29. 29.12345679 × 45 =
  30. 30.12345 × 9 + 6 =
  31. 31.1234 × 8 + 4 =
  32. 32.1111 × 1111 =
  33. 33.12345679 × 54 =
  34. 34.37 × 27 =
  35. 35.1234567 × 9 + 8 =
  36. 36.12345679 × 81 =
  37. 37.12345679 × 45 =
  38. 38.1234567 × 9 + 8 =
  39. 39.12 × 8 + 2 =
  40. 40.12345679 × 45 =

Answer key

  1. 98765
  2. 987654
  3. 333
  4. 123454321
  5. 111111111
  6. 444
  7. 888888888
  8. 111111111
  9. 12321
  10. 987
  11. 666
  12. 888
  13. 777
  14. 555
  15. 222
  16. 1111
  17. 777777777
  18. 121
  19. 999999999
  20. 98765432
  21. 11111
  22. 444444444
  23. 1111111
  24. 12345654321
  25. 333333333
  26. 9876543
  27. 222222222
  28. 111
  29. 555555555
  30. 111111
  31. 9876
  32. 1234321
  33. 666666666
  34. 999
  35. 11111111
  36. 999999999
  37. 555555555
  38. 11111111
  39. 98
  40. 555555555

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