← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 498 · 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 × 18 =
  2. 2.111111 × 111111 =
  3. 3.12345679 × 36 =
  4. 4.37 × 24 =
  5. 5.123 × 9 + 4 =
  6. 6.1234567 × 9 + 8 =
  7. 7.12345678 × 9 + 9 =
  8. 8.1234 × 8 + 4 =
  9. 9.123 × 8 + 3 =
  10. 10.12345678 × 8 + 8 =
  11. 11.123456 × 9 + 7 =
  12. 12.12345679 × 54 =
  13. 13.37 × 18 =
  14. 14.12345679 × 81 =
  15. 15.111 × 111 =
  16. 16.1111 × 1111 =
  17. 17.123456 × 8 + 6 =
  18. 18.1234 × 9 + 5 =
  19. 19.37 × 9 =
  20. 20.12345679 × 45 =
  21. 21.12345679 × 72 =
  22. 22.11111 × 11111 =
  23. 23.12 × 8 + 2 =
  24. 24.123456789 × 8 + 9 =
  25. 25.37 × 27 =
  26. 26.12345 × 9 + 6 =
  27. 27.12345679 × 63 =
  28. 28.123456 × 9 + 7 =
  29. 29.37 × 3 =
  30. 30.12345 × 8 + 5 =
  31. 31.37 × 15 =
  32. 32.11 × 11 =
  33. 33.37 × 21 =
  34. 34.37 × 6 =
  35. 35.1234567 × 8 + 7 =
  36. 36.37 × 12 =
  37. 37.111 × 111 =
  38. 38.37 × 9 =
  39. 39.12345679 × 9 =
  40. 40.1234 × 8 + 4 =

Answer key

  1. 222222222
  2. 12345654321
  3. 444444444
  4. 888
  5. 1111
  6. 11111111
  7. 111111111
  8. 9876
  9. 987
  10. 98765432
  11. 1111111
  12. 666666666
  13. 666
  14. 999999999
  15. 12321
  16. 1234321
  17. 987654
  18. 11111
  19. 333
  20. 555555555
  21. 888888888
  22. 123454321
  23. 98
  24. 987654321
  25. 999
  26. 111111
  27. 777777777
  28. 1111111
  29. 111
  30. 98765
  31. 555
  32. 121
  33. 777
  34. 222
  35. 9876543
  36. 444
  37. 12321
  38. 333
  39. 111111111
  40. 9876

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