← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 982 · 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. 1.11 × 11 =
  2. 2.12345679 × 9 =
  3. 3.37 × 18 =
  4. 4.12 × 8 + 2 =
  5. 5.1111 × 1111 =
  6. 6.111111 × 111111 =
  7. 7.1234 × 9 + 5 =
  8. 8.111 × 111 =
  9. 9.37 × 24 =
  10. 10.123 × 9 + 4 =
  11. 11.12345679 × 54 =
  12. 12.37 × 12 =
  13. 13.12345679 × 18 =
  14. 14.12345679 × 36 =
  15. 15.37 × 9 =
  16. 16.37 × 15 =
  17. 17.12345679 × 63 =
  18. 18.37 × 6 =
  19. 19.37 × 3 =
  20. 20.1234567 × 8 + 7 =
  21. 21.12345678 × 9 + 9 =
  22. 22.123456 × 9 + 7 =
  23. 23.12345679 × 81 =
  24. 24.12345679 × 27 =
  25. 25.123456789 × 8 + 9 =
  26. 26.37 × 21 =
  27. 27.123456 × 8 + 6 =
  28. 28.11111 × 11111 =
  29. 29.12345 × 8 + 5 =
  30. 30.12345678 × 8 + 8 =
  31. 31.12 × 9 + 3 =
  32. 32.1234 × 8 + 4 =
  33. 33.12345679 × 72 =
  34. 34.37 × 9 =
  35. 35.12345678 × 8 + 8 =
  36. 36.123 × 8 + 3 =
  37. 37.37 × 27 =
  38. 38.123456 × 9 + 7 =
  39. 39.12345679 × 45 =
  40. 40.37 × 24 =

Answer key

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

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