← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 797 · 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. 1.12 × 9 + 3 =
  2. 2.1234567 × 9 + 8 =
  3. 3.123456 × 9 + 7 =
  4. 4.11111 × 11111 =
  5. 5.12345679 × 27 =
  6. 6.37 × 3 =
  7. 7.123 × 9 + 4 =
  8. 8.37 × 9 =
  9. 9.12345678 × 9 + 9 =
  10. 10.1234 × 8 + 4 =
  11. 11.11 × 11 =
  12. 12.12345679 × 54 =
  13. 13.123 × 8 + 3 =
  14. 14.12345679 × 72 =
  15. 15.37 × 21 =
  16. 16.37 × 12 =
  17. 17.123456789 × 8 + 9 =
  18. 18.111 × 111 =
  19. 19.12345679 × 63 =
  20. 20.111111 × 111111 =
  21. 21.12345679 × 18 =
  22. 22.12345678 × 8 + 8 =
  23. 23.12 × 8 + 2 =
  24. 24.37 × 24 =
  25. 25.1234 × 9 + 5 =
  26. 26.12345679 × 81 =
  27. 27.1111 × 1111 =
  28. 28.12345 × 8 + 5 =
  29. 29.123456 × 8 + 6 =
  30. 30.37 × 6 =
  31. 31.12345679 × 9 =
  32. 32.1234567 × 8 + 7 =
  33. 33.111 × 111 =
  34. 34.123 × 9 + 4 =
  35. 35.12345 × 9 + 6 =
  36. 36.12345679 × 45 =
  37. 37.11 × 11 =
  38. 38.12345679 × 18 =
  39. 39.37 × 15 =
  40. 40.37 × 3 =

Answer key

  1. 111
  2. 11111111
  3. 1111111
  4. 123454321
  5. 333333333
  6. 111
  7. 1111
  8. 333
  9. 111111111
  10. 9876
  11. 121
  12. 666666666
  13. 987
  14. 888888888
  15. 777
  16. 444
  17. 987654321
  18. 12321
  19. 777777777
  20. 12345654321
  21. 222222222
  22. 98765432
  23. 98
  24. 888
  25. 11111
  26. 999999999
  27. 1234321
  28. 98765
  29. 987654
  30. 222
  31. 111111111
  32. 9876543
  33. 12321
  34. 1111
  35. 111111
  36. 555555555
  37. 121
  38. 222222222
  39. 555
  40. 111

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