← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 569 · 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. 1.111 × 111 =
  2. 2.12345679 × 36 =
  3. 3.123 × 8 + 3 =
  4. 4.1234 × 9 + 5 =
  5. 5.11 × 11 =
  6. 6.12345679 × 18 =
  7. 7.123456 × 9 + 7 =
  8. 8.12 × 8 + 2 =
  9. 9.37 × 6 =
  10. 10.37 × 15 =
  11. 11.1111 × 1111 =
  12. 12.37 × 24 =
  13. 13.123 × 9 + 4 =
  14. 14.37 × 27 =
  15. 15.12345 × 9 + 6 =
  16. 16.37 × 9 =
  17. 17.12345678 × 8 + 8 =
  18. 18.12345 × 8 + 5 =
  19. 19.12345679 × 45 =
  20. 20.12345678 × 9 + 9 =
  21. 21.1234567 × 9 + 8 =
  22. 22.123456789 × 8 + 9 =
  23. 23.11111 × 11111 =
  24. 24.12 × 9 + 3 =
  25. 25.12345679 × 72 =
  26. 26.12345679 × 63 =
  27. 27.37 × 18 =
  28. 28.37 × 21 =
  29. 29.12345679 × 9 =
  30. 30.1234567 × 8 + 7 =
  31. 31.111111 × 111111 =
  32. 32.37 × 12 =
  33. 33.37 × 27 =
  34. 34.37 × 3 =
  35. 35.1234 × 8 + 4 =
  36. 36.12345679 × 27 =
  37. 37.123456 × 8 + 6 =
  38. 38.12345678 × 9 + 9 =
  39. 39.11111 × 11111 =
  40. 40.1234567 × 8 + 7 =

Answer key

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

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