← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 743 · 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. 1.12 × 8 + 2 =
  2. 2.37 × 6 =
  3. 3.1234 × 9 + 5 =
  4. 4.12345679 × 9 =
  5. 5.11 × 11 =
  6. 6.12345679 × 81 =
  7. 7.37 × 12 =
  8. 8.37 × 15 =
  9. 9.1111 × 1111 =
  10. 10.37 × 3 =
  11. 11.12345679 × 27 =
  12. 12.111111 × 111111 =
  13. 13.12345678 × 9 + 9 =
  14. 14.123 × 8 + 3 =
  15. 15.123456 × 8 + 6 =
  16. 16.12345 × 9 + 6 =
  17. 17.12345678 × 8 + 8 =
  18. 18.123 × 9 + 4 =
  19. 19.12 × 9 + 3 =
  20. 20.37 × 27 =
  21. 21.37 × 18 =
  22. 22.37 × 24 =
  23. 23.11111 × 11111 =
  24. 24.1234 × 8 + 4 =
  25. 25.12345679 × 18 =
  26. 26.1234567 × 9 + 8 =
  27. 27.37 × 21 =
  28. 28.123456 × 9 + 7 =
  29. 29.1234567 × 8 + 7 =
  30. 30.12345679 × 63 =
  31. 31.111 × 111 =
  32. 32.12345679 × 54 =
  33. 33.1111 × 1111 =
  34. 34.12345 × 8 + 5 =
  35. 35.12345679 × 45 =
  36. 36.12345679 × 36 =
  37. 37.12345678 × 8 + 8 =
  38. 38.123456 × 9 + 7 =
  39. 39.37 × 9 =
  40. 40.123 × 8 + 3 =

Answer key

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

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