← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 444 · 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 × 3 =
  2. 2.123 × 9 + 4 =
  3. 3.1111 × 1111 =
  4. 4.1234567 × 9 + 8 =
  5. 5.111 × 111 =
  6. 6.37 × 15 =
  7. 7.12345679 × 18 =
  8. 8.37 × 6 =
  9. 9.111111 × 111111 =
  10. 10.12345679 × 9 =
  11. 11.37 × 18 =
  12. 12.12 × 9 + 3 =
  13. 13.11 × 11 =
  14. 14.12345679 × 72 =
  15. 15.1234 × 8 + 4 =
  16. 16.11111 × 11111 =
  17. 17.12345678 × 8 + 8 =
  18. 18.37 × 27 =
  19. 19.12345678 × 9 + 9 =
  20. 20.12345679 × 36 =
  21. 21.123 × 8 + 3 =
  22. 22.12345 × 8 + 5 =
  23. 23.37 × 9 =
  24. 24.12345679 × 81 =
  25. 25.12345679 × 45 =
  26. 26.12 × 8 + 2 =
  27. 27.12345679 × 63 =
  28. 28.12345 × 9 + 6 =
  29. 29.123456 × 8 + 6 =
  30. 30.37 × 12 =
  31. 31.37 × 24 =
  32. 32.12345679 × 54 =
  33. 33.1234567 × 8 + 7 =
  34. 34.37 × 21 =
  35. 35.12345679 × 27 =
  36. 36.123456789 × 8 + 9 =
  37. 37.123456 × 9 + 7 =
  38. 38.111111 × 111111 =
  39. 39.1234 × 9 + 5 =
  40. 40.12 × 8 + 2 =

Answer key

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

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