← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 77 · 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. 2.37 × 24 =
  3. 3.1234 × 8 + 4 =
  4. 4.12345679 × 27 =
  5. 5.37 × 18 =
  6. 6.12345679 × 36 =
  7. 7.111 × 111 =
  8. 8.12345679 × 18 =
  9. 9.11111 × 11111 =
  10. 10.12345678 × 8 + 8 =
  11. 11.12345679 × 72 =
  12. 12.1234567 × 9 + 8 =
  13. 13.11 × 11 =
  14. 14.1234567 × 8 + 7 =
  15. 15.12345678 × 9 + 9 =
  16. 16.1111 × 1111 =
  17. 17.111111 × 111111 =
  18. 18.12345679 × 9 =
  19. 19.37 × 6 =
  20. 20.123456789 × 8 + 9 =
  21. 21.12 × 9 + 3 =
  22. 22.12345 × 8 + 5 =
  23. 23.12345 × 9 + 6 =
  24. 24.37 × 12 =
  25. 25.12345679 × 81 =
  26. 26.37 × 3 =
  27. 27.37 × 21 =
  28. 28.37 × 15 =
  29. 29.1234 × 9 + 5 =
  30. 30.12345679 × 45 =
  31. 31.12345679 × 63 =
  32. 32.12 × 8 + 2 =
  33. 33.123 × 8 + 3 =
  34. 34.12345679 × 54 =
  35. 35.123456 × 8 + 6 =
  36. 36.123456 × 9 + 7 =
  37. 37.111 × 111 =
  38. 38.123 × 9 + 4 =
  39. 39.37 × 9 =
  40. 40.11 × 11 =

Answer key

  1. 999
  2. 888
  3. 9876
  4. 333333333
  5. 666
  6. 444444444
  7. 12321
  8. 222222222
  9. 123454321
  10. 98765432
  11. 888888888
  12. 11111111
  13. 121
  14. 9876543
  15. 111111111
  16. 1234321
  17. 12345654321
  18. 111111111
  19. 222
  20. 987654321
  21. 111
  22. 98765
  23. 111111
  24. 444
  25. 999999999
  26. 111
  27. 777
  28. 555
  29. 11111
  30. 555555555
  31. 777777777
  32. 98
  33. 987
  34. 666666666
  35. 987654
  36. 1111111
  37. 12321
  38. 1111
  39. 333
  40. 121

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