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Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 993 · 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. 1.123 × 9 + 4 =
  2. 2.11111 × 11111 =
  3. 3.12345 × 9 + 6 =
  4. 4.1234567 × 8 + 7 =
  5. 5.12345679 × 9 =
  6. 6.12345679 × 54 =
  7. 7.1234 × 9 + 5 =
  8. 8.37 × 24 =
  9. 9.1111 × 1111 =
  10. 10.111 × 111 =
  11. 11.11 × 11 =
  12. 12.37 × 9 =
  13. 13.12345679 × 63 =
  14. 14.123456789 × 8 + 9 =
  15. 15.1234 × 8 + 4 =
  16. 16.37 × 21 =
  17. 17.12345678 × 8 + 8 =
  18. 18.12345679 × 18 =
  19. 19.37 × 6 =
  20. 20.123 × 8 + 3 =
  21. 21.37 × 27 =
  22. 22.12345 × 8 + 5 =
  23. 23.123456 × 8 + 6 =
  24. 24.12345679 × 27 =
  25. 25.37 × 3 =
  26. 26.12345679 × 72 =
  27. 27.12345679 × 81 =
  28. 28.123456 × 9 + 7 =
  29. 29.12 × 8 + 2 =
  30. 30.12 × 9 + 3 =
  31. 31.1234567 × 9 + 8 =
  32. 32.37 × 12 =
  33. 33.12345679 × 36 =
  34. 34.12345678 × 9 + 9 =
  35. 35.12345679 × 9 =
  36. 36.111111 × 111111 =
  37. 37.37 × 18 =
  38. 38.37 × 15 =
  39. 39.12345679 × 9 =
  40. 40.12345679 × 45 =

Answer key

  1. 1111
  2. 123454321
  3. 111111
  4. 9876543
  5. 111111111
  6. 666666666
  7. 11111
  8. 888
  9. 1234321
  10. 12321
  11. 121
  12. 333
  13. 777777777
  14. 987654321
  15. 9876
  16. 777
  17. 98765432
  18. 222222222
  19. 222
  20. 987
  21. 999
  22. 98765
  23. 987654
  24. 333333333
  25. 111
  26. 888888888
  27. 999999999
  28. 1111111
  29. 98
  30. 111
  31. 11111111
  32. 444
  33. 444444444
  34. 111111111
  35. 111111111
  36. 12345654321
  37. 666
  38. 555
  39. 111111111
  40. 555555555

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