← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 382 · 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. 1.37 × 27 =
  2. 2.11 × 11 =
  3. 3.1234 × 8 + 4 =
  4. 4.123 × 9 + 4 =
  5. 5.123456789 × 8 + 9 =
  6. 6.111 × 111 =
  7. 7.12345678 × 9 + 9 =
  8. 8.37 × 18 =
  9. 9.123456 × 9 + 7 =
  10. 10.12345679 × 72 =
  11. 11.11111 × 11111 =
  12. 12.12345679 × 54 =
  13. 13.12345679 × 45 =
  14. 14.12345679 × 9 =
  15. 15.12 × 9 + 3 =
  16. 16.1234 × 9 + 5 =
  17. 17.111111 × 111111 =
  18. 18.37 × 12 =
  19. 19.37 × 15 =
  20. 20.123456 × 8 + 6 =
  21. 21.1234567 × 8 + 7 =
  22. 22.12345678 × 8 + 8 =
  23. 23.1234567 × 9 + 8 =
  24. 24.12345679 × 63 =
  25. 25.12345 × 9 + 6 =
  26. 26.37 × 9 =
  27. 27.12345679 × 81 =
  28. 28.12 × 8 + 2 =
  29. 29.12345679 × 27 =
  30. 30.37 × 3 =
  31. 31.37 × 24 =
  32. 32.12345 × 9 + 6 =
  33. 33.12345678 × 9 + 9 =
  34. 34.37 × 21 =
  35. 35.123 × 8 + 3 =
  36. 36.1111 × 1111 =
  37. 37.12345679 × 45 =
  38. 38.12345 × 8 + 5 =
  39. 39.12345679 × 36 =
  40. 40.37 × 6 =

Answer key

  1. 999
  2. 121
  3. 9876
  4. 1111
  5. 987654321
  6. 12321
  7. 111111111
  8. 666
  9. 1111111
  10. 888888888
  11. 123454321
  12. 666666666
  13. 555555555
  14. 111111111
  15. 111
  16. 11111
  17. 12345654321
  18. 444
  19. 555
  20. 987654
  21. 9876543
  22. 98765432
  23. 11111111
  24. 777777777
  25. 111111
  26. 333
  27. 999999999
  28. 98
  29. 333333333
  30. 111
  31. 888
  32. 111111
  33. 111111111
  34. 777
  35. 987
  36. 1234321
  37. 555555555
  38. 98765
  39. 444444444
  40. 222

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