← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 908 · 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. 1.1234567 × 9 + 8 =
  2. 2.11111 × 11111 =
  3. 3.12345 × 8 + 5 =
  4. 4.111111 × 111111 =
  5. 5.1234 × 8 + 4 =
  6. 6.37 × 9 =
  7. 7.123 × 8 + 3 =
  8. 8.123 × 9 + 4 =
  9. 9.12345678 × 8 + 8 =
  10. 10.12345679 × 27 =
  11. 11.12345678 × 9 + 9 =
  12. 12.37 × 21 =
  13. 13.12345679 × 81 =
  14. 14.12345679 × 36 =
  15. 15.123456 × 9 + 7 =
  16. 16.37 × 12 =
  17. 17.1234 × 9 + 5 =
  18. 18.12345679 × 54 =
  19. 19.37 × 6 =
  20. 20.123456789 × 8 + 9 =
  21. 21.11 × 11 =
  22. 22.1111 × 1111 =
  23. 23.12 × 8 + 2 =
  24. 24.123456 × 8 + 6 =
  25. 25.12345679 × 9 =
  26. 26.12345679 × 63 =
  27. 27.37 × 27 =
  28. 28.37 × 24 =
  29. 29.111 × 111 =
  30. 30.37 × 3 =
  31. 31.12345679 × 45 =
  32. 32.12345679 × 18 =
  33. 33.12345679 × 72 =
  34. 34.12345 × 9 + 6 =
  35. 35.37 × 15 =
  36. 36.12345679 × 81 =
  37. 37.12345679 × 18 =
  38. 38.37 × 18 =
  39. 39.12 × 9 + 3 =
  40. 40.123456789 × 8 + 9 =

Answer key

  1. 11111111
  2. 123454321
  3. 98765
  4. 12345654321
  5. 9876
  6. 333
  7. 987
  8. 1111
  9. 98765432
  10. 333333333
  11. 111111111
  12. 777
  13. 999999999
  14. 444444444
  15. 1111111
  16. 444
  17. 11111
  18. 666666666
  19. 222
  20. 987654321
  21. 121
  22. 1234321
  23. 98
  24. 987654
  25. 111111111
  26. 777777777
  27. 999
  28. 888
  29. 12321
  30. 111
  31. 555555555
  32. 222222222
  33. 888888888
  34. 111111
  35. 555
  36. 999999999
  37. 222222222
  38. 666
  39. 111
  40. 987654321

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