← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 96 · 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. 1.123456 × 9 + 7 =
  2. 2.12345679 × 72 =
  3. 3.12345679 × 54 =
  4. 4.1111 × 1111 =
  5. 5.12345 × 8 + 5 =
  6. 6.37 × 24 =
  7. 7.12345679 × 81 =
  8. 8.37 × 27 =
  9. 9.1234567 × 9 + 8 =
  10. 10.12345679 × 18 =
  11. 11.12345 × 9 + 6 =
  12. 12.12 × 9 + 3 =
  13. 13.1234 × 8 + 4 =
  14. 14.11111 × 11111 =
  15. 15.123 × 9 + 4 =
  16. 16.111 × 111 =
  17. 17.37 × 15 =
  18. 18.11 × 11 =
  19. 19.37 × 21 =
  20. 20.12345678 × 9 + 9 =
  21. 21.37 × 3 =
  22. 22.37 × 9 =
  23. 23.111111 × 111111 =
  24. 24.12345679 × 63 =
  25. 25.37 × 18 =
  26. 26.37 × 12 =
  27. 27.12345678 × 8 + 8 =
  28. 28.1234 × 9 + 5 =
  29. 29.1234567 × 8 + 7 =
  30. 30.123456789 × 8 + 9 =
  31. 31.37 × 6 =
  32. 32.12345679 × 81 =
  33. 33.123 × 8 + 3 =
  34. 34.12345679 × 45 =
  35. 35.12 × 8 + 2 =
  36. 36.12345679 × 27 =
  37. 37.12345 × 9 + 6 =
  38. 38.11 × 11 =
  39. 39.12345679 × 36 =
  40. 40.12345679 × 9 =

Answer key

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

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks