← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 2 · 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. 1.123 × 9 + 4 =
  2. 2.37 × 27 =
  3. 3.111 × 111 =
  4. 4.12345679 × 63 =
  5. 5.12345679 × 9 =
  6. 6.123456 × 8 + 6 =
  7. 7.12345679 × 18 =
  8. 8.12345679 × 72 =
  9. 9.1234 × 9 + 5 =
  10. 10.12345679 × 45 =
  11. 11.123 × 8 + 3 =
  12. 12.123456 × 9 + 7 =
  13. 13.12345 × 8 + 5 =
  14. 14.1111 × 1111 =
  15. 15.1234 × 8 + 4 =
  16. 16.37 × 12 =
  17. 17.1234567 × 8 + 7 =
  18. 18.12 × 9 + 3 =
  19. 19.37 × 21 =
  20. 20.12345679 × 81 =
  21. 21.1234567 × 9 + 8 =
  22. 22.37 × 3 =
  23. 23.12345679 × 54 =
  24. 24.11111 × 11111 =
  25. 25.111111 × 111111 =
  26. 26.12345679 × 36 =
  27. 27.123456789 × 8 + 9 =
  28. 28.11 × 11 =
  29. 29.12 × 8 + 2 =
  30. 30.12345678 × 8 + 8 =
  31. 31.111 × 111 =
  32. 32.37 × 9 =
  33. 33.12345678 × 9 + 9 =
  34. 34.37 × 15 =
  35. 35.37 × 18 =
  36. 36.12345 × 9 + 6 =
  37. 37.37 × 24 =
  38. 38.123456 × 9 + 7 =
  39. 39.123456 × 9 + 7 =
  40. 40.12345679 × 81 =

Answer key

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

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