← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 12 · 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. 2.123 × 9 + 4 =
  3. 3.12345678 × 8 + 8 =
  4. 4.1111 × 1111 =
  5. 5.12345 × 9 + 6 =
  6. 6.111111 × 111111 =
  7. 7.37 × 3 =
  8. 8.12345679 × 9 =
  9. 9.123456789 × 8 + 9 =
  10. 10.12345679 × 36 =
  11. 11.37 × 21 =
  12. 12.11 × 11 =
  13. 13.123456 × 8 + 6 =
  14. 14.37 × 18 =
  15. 15.12 × 8 + 2 =
  16. 16.123456 × 9 + 7 =
  17. 17.12345679 × 72 =
  18. 18.1234567 × 8 + 7 =
  19. 19.12345679 × 18 =
  20. 20.12 × 9 + 3 =
  21. 21.12345679 × 54 =
  22. 22.37 × 24 =
  23. 23.11111 × 11111 =
  24. 24.12345679 × 27 =
  25. 25.12345679 × 81 =
  26. 26.37 × 6 =
  27. 27.37 × 12 =
  28. 28.37 × 9 =
  29. 29.12345679 × 45 =
  30. 30.12345 × 8 + 5 =
  31. 31.1234 × 8 + 4 =
  32. 32.12345678 × 9 + 9 =
  33. 33.111 × 111 =
  34. 34.1234567 × 9 + 8 =
  35. 35.12345679 × 63 =
  36. 36.123 × 9 + 4 =
  37. 37.1234567 × 8 + 7 =
  38. 38.37 × 15 =
  39. 39.123456 × 9 + 7 =
  40. 40.1234 × 9 + 5 =

Answer key

  1. 999
  2. 1111
  3. 98765432
  4. 1234321
  5. 111111
  6. 12345654321
  7. 111
  8. 111111111
  9. 987654321
  10. 444444444
  11. 777
  12. 121
  13. 987654
  14. 666
  15. 98
  16. 1111111
  17. 888888888
  18. 9876543
  19. 222222222
  20. 111
  21. 666666666
  22. 888
  23. 123454321
  24. 333333333
  25. 999999999
  26. 222
  27. 444
  28. 333
  29. 555555555
  30. 98765
  31. 9876
  32. 111111111
  33. 12321
  34. 11111111
  35. 777777777
  36. 1111
  37. 9876543
  38. 555
  39. 1111111
  40. 11111

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