← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 934 · 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. 3.12345679 × 27 =
  4. 4.1234567 × 8 + 7 =
  5. 5.11 × 11 =
  6. 6.12345679 × 54 =
  7. 7.37 × 9 =
  8. 8.37 × 18 =
  9. 9.12345679 × 81 =
  10. 10.123456 × 8 + 6 =
  11. 11.123456789 × 8 + 9 =
  12. 12.123456 × 9 + 7 =
  13. 13.123 × 9 + 4 =
  14. 14.123 × 8 + 3 =
  15. 15.111111 × 111111 =
  16. 16.12345679 × 18 =
  17. 17.1234567 × 9 + 8 =
  18. 18.12345679 × 9 =
  19. 19.37 × 24 =
  20. 20.111 × 111 =
  21. 21.1234 × 8 + 4 =
  22. 22.12345678 × 8 + 8 =
  23. 23.37 × 15 =
  24. 24.11111 × 11111 =
  25. 25.1234 × 9 + 5 =
  26. 26.12345679 × 63 =
  27. 27.37 × 21 =
  28. 28.12345679 × 36 =
  29. 29.12 × 8 + 2 =
  30. 30.1111 × 1111 =
  31. 31.37 × 27 =
  32. 32.12345678 × 9 + 9 =
  33. 33.37 × 3 =
  34. 34.37 × 12 =
  35. 35.37 × 6 =
  36. 36.12345679 × 45 =
  37. 37.123456789 × 8 + 9 =
  38. 38.12345 × 9 + 6 =
  39. 39.1234 × 8 + 4 =
  40. 40.12345679 × 72 =

Answer key

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

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