← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 215 · 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. 1.11111 × 11111 =
  2. 2.37 × 12 =
  3. 3.123456 × 9 + 7 =
  4. 4.12345679 × 63 =
  5. 5.12345679 × 36 =
  6. 6.123456789 × 8 + 9 =
  7. 7.12 × 9 + 3 =
  8. 8.111 × 111 =
  9. 9.12345679 × 72 =
  10. 10.111111 × 111111 =
  11. 11.37 × 18 =
  12. 12.1234567 × 9 + 8 =
  13. 13.12345679 × 45 =
  14. 14.12345679 × 27 =
  15. 15.1234 × 8 + 4 =
  16. 16.37 × 27 =
  17. 17.12345678 × 9 + 9 =
  18. 18.123 × 8 + 3 =
  19. 19.1234 × 9 + 5 =
  20. 20.12 × 8 + 2 =
  21. 21.12345 × 9 + 6 =
  22. 22.12345679 × 81 =
  23. 23.12345678 × 8 + 8 =
  24. 24.12345 × 8 + 5 =
  25. 25.1111 × 1111 =
  26. 26.12345679 × 54 =
  27. 27.1234567 × 8 + 7 =
  28. 28.12345679 × 9 =
  29. 29.37 × 21 =
  30. 30.37 × 3 =
  31. 31.12345679 × 18 =
  32. 32.123 × 9 + 4 =
  33. 33.37 × 24 =
  34. 34.37 × 9 =
  35. 35.11 × 11 =
  36. 36.111111 × 111111 =
  37. 37.123456789 × 8 + 9 =
  38. 38.12345679 × 54 =
  39. 39.123456 × 9 + 7 =
  40. 40.111111 × 111111 =

Answer key

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

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