← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 7 · 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 × 72 =
  3. 3.123456 × 9 + 7 =
  4. 4.1111 × 1111 =
  5. 5.37 × 27 =
  6. 6.11111 × 11111 =
  7. 7.1234567 × 9 + 8 =
  8. 8.123 × 8 + 3 =
  9. 9.12 × 9 + 3 =
  10. 10.111 × 111 =
  11. 11.12345 × 9 + 6 =
  12. 12.12345 × 8 + 5 =
  13. 13.1234567 × 8 + 7 =
  14. 14.37 × 3 =
  15. 15.12345679 × 45 =
  16. 16.37 × 12 =
  17. 17.12345678 × 9 + 9 =
  18. 18.37 × 6 =
  19. 19.12345679 × 9 =
  20. 20.12 × 8 + 2 =
  21. 21.1234 × 9 + 5 =
  22. 22.11 × 11 =
  23. 23.123 × 9 + 4 =
  24. 24.12345679 × 18 =
  25. 25.1234 × 8 + 4 =
  26. 26.12345679 × 54 =
  27. 27.12345678 × 8 + 8 =
  28. 28.12345679 × 36 =
  29. 29.12345679 × 27 =
  30. 30.123456 × 8 + 6 =
  31. 31.37 × 18 =
  32. 32.123456789 × 8 + 9 =
  33. 33.37 × 24 =
  34. 34.37 × 9 =
  35. 35.37 × 21 =
  36. 36.12345679 × 63 =
  37. 37.1111 × 1111 =
  38. 38.12345678 × 9 + 9 =
  39. 39.37 × 15 =
  40. 40.12345679 × 27 =

Answer key

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

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