← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 900 · 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. 2.12 × 8 + 2 =
  3. 3.111111 × 111111 =
  4. 4.37 × 27 =
  5. 5.12345679 × 45 =
  6. 6.123456 × 9 + 7 =
  7. 7.12345679 × 81 =
  8. 8.11111 × 11111 =
  9. 9.123 × 9 + 4 =
  10. 10.12345679 × 72 =
  11. 11.1234 × 8 + 4 =
  12. 12.123456789 × 8 + 9 =
  13. 13.111 × 111 =
  14. 14.12345679 × 9 =
  15. 15.123456 × 8 + 6 =
  16. 16.37 × 18 =
  17. 17.12345679 × 36 =
  18. 18.11 × 11 =
  19. 19.1111 × 1111 =
  20. 20.12345678 × 9 + 9 =
  21. 21.1234 × 9 + 5 =
  22. 22.12345 × 9 + 6 =
  23. 23.123 × 8 + 3 =
  24. 24.37 × 15 =
  25. 25.37 × 12 =
  26. 26.12345679 × 18 =
  27. 27.12345679 × 63 =
  28. 28.37 × 24 =
  29. 29.37 × 9 =
  30. 30.37 × 6 =
  31. 31.12345678 × 8 + 8 =
  32. 32.12345679 × 54 =
  33. 33.1234567 × 8 + 7 =
  34. 34.37 × 21 =
  35. 35.12345679 × 27 =
  36. 36.1234567 × 9 + 8 =
  37. 37.12 × 9 + 3 =
  38. 38.1111 × 1111 =
  39. 39.11 × 11 =
  40. 40.37 × 3 =

Answer key

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

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