← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 526 · 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. 3.12345679 × 18 =
  4. 4.12 × 9 + 3 =
  5. 5.37 × 15 =
  6. 6.12345678 × 8 + 8 =
  7. 7.111111 × 111111 =
  8. 8.12345679 × 27 =
  9. 9.1234 × 9 + 5 =
  10. 10.1234 × 8 + 4 =
  11. 11.11111 × 11111 =
  12. 12.37 × 27 =
  13. 13.123456 × 9 + 7 =
  14. 14.123 × 9 + 4 =
  15. 15.12345679 × 72 =
  16. 16.12345679 × 81 =
  17. 17.37 × 6 =
  18. 18.123456789 × 8 + 9 =
  19. 19.37 × 12 =
  20. 20.1111 × 1111 =
  21. 21.37 × 9 =
  22. 22.37 × 24 =
  23. 23.12345679 × 9 =
  24. 24.12345 × 9 + 6 =
  25. 25.123 × 8 + 3 =
  26. 26.37 × 3 =
  27. 27.11 × 11 =
  28. 28.1234567 × 9 + 8 =
  29. 29.12 × 8 + 2 =
  30. 30.12345 × 8 + 5 =
  31. 31.37 × 18 =
  32. 32.1234567 × 8 + 7 =
  33. 33.37 × 21 =
  34. 34.12345679 × 63 =
  35. 35.12345679 × 45 =
  36. 36.37 × 12 =
  37. 37.37 × 27 =
  38. 38.12345678 × 9 + 9 =
  39. 39.37 × 21 =
  40. 40.1111 × 1111 =

Answer key

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

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