← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 717 · 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. 1.123456 × 9 + 7 =
  2. 2.37 × 3 =
  3. 3.12345679 × 81 =
  4. 4.11 × 11 =
  5. 5.12345679 × 27 =
  6. 6.37 × 9 =
  7. 7.123 × 9 + 4 =
  8. 8.37 × 21 =
  9. 9.12345679 × 9 =
  10. 10.12345679 × 72 =
  11. 11.123456 × 8 + 6 =
  12. 12.37 × 6 =
  13. 13.1111 × 1111 =
  14. 14.12 × 9 + 3 =
  15. 15.11111 × 11111 =
  16. 16.37 × 15 =
  17. 17.12345679 × 45 =
  18. 18.1234567 × 8 + 7 =
  19. 19.12345679 × 36 =
  20. 20.111111 × 111111 =
  21. 21.12345679 × 18 =
  22. 22.111 × 111 =
  23. 23.1234 × 8 + 4 =
  24. 24.37 × 12 =
  25. 25.12345 × 9 + 6 =
  26. 26.1234567 × 9 + 8 =
  27. 27.12345679 × 63 =
  28. 28.1234 × 9 + 5 =
  29. 29.12 × 8 + 2 =
  30. 30.12345 × 8 + 5 =
  31. 31.12345679 × 54 =
  32. 32.37 × 18 =
  33. 33.12345 × 8 + 5 =
  34. 34.123456 × 8 + 6 =
  35. 35.12345679 × 36 =
  36. 36.12345 × 8 + 5 =
  37. 37.123456789 × 8 + 9 =
  38. 38.37 × 27 =
  39. 39.37 × 9 =
  40. 40.12345679 × 36 =

Answer key

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

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