← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 355 · 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. 1.12345679 × 63 =
  2. 2.37 × 6 =
  3. 3.12345678 × 9 + 9 =
  4. 4.12345679 × 54 =
  5. 5.11111 × 11111 =
  6. 6.12 × 8 + 2 =
  7. 7.12345 × 9 + 6 =
  8. 8.1234567 × 8 + 7 =
  9. 9.37 × 24 =
  10. 10.12345679 × 45 =
  11. 11.12345679 × 18 =
  12. 12.12345 × 8 + 5 =
  13. 13.12345679 × 72 =
  14. 14.12345679 × 9 =
  15. 15.37 × 21 =
  16. 16.37 × 3 =
  17. 17.12345679 × 81 =
  18. 18.123456789 × 8 + 9 =
  19. 19.1234 × 8 + 4 =
  20. 20.37 × 9 =
  21. 21.1234567 × 9 + 8 =
  22. 22.37 × 12 =
  23. 23.37 × 18 =
  24. 24.123 × 9 + 4 =
  25. 25.37 × 27 =
  26. 26.123 × 8 + 3 =
  27. 27.111 × 111 =
  28. 28.123456 × 9 + 7 =
  29. 29.12345679 × 9 =
  30. 30.11 × 11 =
  31. 31.11 × 11 =
  32. 32.123456 × 8 + 6 =
  33. 33.12345678 × 8 + 8 =
  34. 34.37 × 15 =
  35. 35.12345678 × 9 + 9 =
  36. 36.111111 × 111111 =
  37. 37.12 × 9 + 3 =
  38. 38.12345 × 8 + 5 =
  39. 39.1234 × 9 + 5 =
  40. 40.1111 × 1111 =

Answer key

  1. 777777777
  2. 222
  3. 111111111
  4. 666666666
  5. 123454321
  6. 98
  7. 111111
  8. 9876543
  9. 888
  10. 555555555
  11. 222222222
  12. 98765
  13. 888888888
  14. 111111111
  15. 777
  16. 111
  17. 999999999
  18. 987654321
  19. 9876
  20. 333
  21. 11111111
  22. 444
  23. 666
  24. 1111
  25. 999
  26. 987
  27. 12321
  28. 1111111
  29. 111111111
  30. 121
  31. 121
  32. 987654
  33. 98765432
  34. 555
  35. 111111111
  36. 12345654321
  37. 111
  38. 98765
  39. 11111
  40. 1234321

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