← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 237 · 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. 1.11111 × 11111 =
  2. 2.123 × 8 + 3 =
  3. 3.11 × 11 =
  4. 4.12345678 × 8 + 8 =
  5. 5.37 × 18 =
  6. 6.37 × 3 =
  7. 7.37 × 27 =
  8. 8.37 × 21 =
  9. 9.37 × 12 =
  10. 10.1234 × 8 + 4 =
  11. 11.12 × 8 + 2 =
  12. 12.123456789 × 8 + 9 =
  13. 13.123456 × 9 + 7 =
  14. 14.37 × 9 =
  15. 15.37 × 6 =
  16. 16.37 × 24 =
  17. 17.12345 × 9 + 6 =
  18. 18.12345679 × 45 =
  19. 19.1234 × 9 + 5 =
  20. 20.12 × 9 + 3 =
  21. 21.12345679 × 63 =
  22. 22.12345679 × 54 =
  23. 23.12345678 × 9 + 9 =
  24. 24.111 × 111 =
  25. 25.12345679 × 27 =
  26. 26.123 × 9 + 4 =
  27. 27.1111 × 1111 =
  28. 28.12345679 × 18 =
  29. 29.12345679 × 36 =
  30. 30.12345679 × 9 =
  31. 31.12345679 × 72 =
  32. 32.1234567 × 8 + 7 =
  33. 33.111111 × 111111 =
  34. 34.11111 × 11111 =
  35. 35.123456 × 8 + 6 =
  36. 36.12345679 × 81 =
  37. 37.11111 × 11111 =
  38. 38.12345 × 8 + 5 =
  39. 39.12345679 × 81 =
  40. 40.11111 × 11111 =

Answer key

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

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