← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 82 · 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. 2.37 × 3 =
  3. 3.123 × 8 + 3 =
  4. 4.11111 × 11111 =
  5. 5.1234 × 9 + 5 =
  6. 6.1234567 × 8 + 7 =
  7. 7.1234 × 8 + 4 =
  8. 8.123456789 × 8 + 9 =
  9. 9.12345679 × 9 =
  10. 10.12345678 × 9 + 9 =
  11. 11.111 × 111 =
  12. 12.12345679 × 27 =
  13. 13.12345679 × 36 =
  14. 14.12345 × 9 + 6 =
  15. 15.37 × 12 =
  16. 16.1234567 × 9 + 8 =
  17. 17.12 × 8 + 2 =
  18. 18.11 × 11 =
  19. 19.12345679 × 63 =
  20. 20.37 × 15 =
  21. 21.12345679 × 72 =
  22. 22.123456 × 8 + 6 =
  23. 23.37 × 18 =
  24. 24.12345679 × 81 =
  25. 25.37 × 6 =
  26. 26.37 × 21 =
  27. 27.1111 × 1111 =
  28. 28.12345679 × 54 =
  29. 29.123 × 9 + 4 =
  30. 30.12345678 × 8 + 8 =
  31. 31.111111 × 111111 =
  32. 32.12345679 × 45 =
  33. 33.37 × 27 =
  34. 34.123456 × 9 + 7 =
  35. 35.12345679 × 18 =
  36. 36.12 × 9 + 3 =
  37. 37.37 × 9 =
  38. 38.37 × 24 =
  39. 39.12345679 × 9 =
  40. 40.1234567 × 9 + 8 =

Answer key

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

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