← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 902 · 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. 2.12345679 × 54 =
  3. 3.123456 × 9 + 7 =
  4. 4.37 × 24 =
  5. 5.12345 × 8 + 5 =
  6. 6.123456 × 8 + 6 =
  7. 7.123 × 9 + 4 =
  8. 8.37 × 9 =
  9. 9.111111 × 111111 =
  10. 10.11111 × 11111 =
  11. 11.1111 × 1111 =
  12. 12.11 × 11 =
  13. 13.37 × 18 =
  14. 14.12 × 8 + 2 =
  15. 15.12345678 × 8 + 8 =
  16. 16.37 × 6 =
  17. 17.37 × 27 =
  18. 18.37 × 15 =
  19. 19.37 × 21 =
  20. 20.12345679 × 9 =
  21. 21.12345679 × 72 =
  22. 22.12 × 9 + 3 =
  23. 23.12345679 × 18 =
  24. 24.1234 × 8 + 4 =
  25. 25.123 × 8 + 3 =
  26. 26.111 × 111 =
  27. 27.12345678 × 9 + 9 =
  28. 28.12345679 × 81 =
  29. 29.1234567 × 8 + 7 =
  30. 30.12345679 × 27 =
  31. 31.12345 × 9 + 6 =
  32. 32.123456789 × 8 + 9 =
  33. 33.1234567 × 9 + 8 =
  34. 34.12345679 × 45 =
  35. 35.12345679 × 63 =
  36. 36.1234 × 9 + 5 =
  37. 37.37 × 12 =
  38. 38.1234567 × 9 + 8 =
  39. 39.11111 × 11111 =
  40. 40.12345679 × 36 =

Answer key

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

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