← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 356 · 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. 1.111111 × 111111 =
  2. 2.12345679 × 54 =
  3. 3.11 × 11 =
  4. 4.1234 × 8 + 4 =
  5. 5.11111 × 11111 =
  6. 6.12 × 9 + 3 =
  7. 7.12345678 × 9 + 9 =
  8. 8.12345679 × 45 =
  9. 9.123456 × 9 + 7 =
  10. 10.1234567 × 9 + 8 =
  11. 11.37 × 21 =
  12. 12.123 × 9 + 4 =
  13. 13.123456789 × 8 + 9 =
  14. 14.1111 × 1111 =
  15. 15.1234 × 9 + 5 =
  16. 16.37 × 27 =
  17. 17.12 × 8 + 2 =
  18. 18.12345679 × 36 =
  19. 19.12345679 × 63 =
  20. 20.12345679 × 18 =
  21. 21.37 × 3 =
  22. 22.12345678 × 8 + 8 =
  23. 23.37 × 24 =
  24. 24.12345679 × 9 =
  25. 25.1234567 × 8 + 7 =
  26. 26.111 × 111 =
  27. 27.12345679 × 81 =
  28. 28.12345679 × 72 =
  29. 29.12345679 × 27 =
  30. 30.123 × 8 + 3 =
  31. 31.37 × 9 =
  32. 32.12 × 8 + 2 =
  33. 33.12345 × 8 + 5 =
  34. 34.37 × 12 =
  35. 35.37 × 15 =
  36. 36.37 × 18 =
  37. 37.12 × 9 + 3 =
  38. 38.123456 × 8 + 6 =
  39. 39.37 × 24 =
  40. 40.12345 × 9 + 6 =

Answer key

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

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