← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 771 · 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 × 9 + 3 =
  2. 2.12345679 × 72 =
  3. 3.37 × 24 =
  4. 4.11 × 11 =
  5. 5.37 × 18 =
  6. 6.111 × 111 =
  7. 7.37 × 27 =
  8. 8.37 × 12 =
  9. 9.12345 × 8 + 5 =
  10. 10.123456 × 8 + 6 =
  11. 11.123456789 × 8 + 9 =
  12. 12.11111 × 11111 =
  13. 13.12345679 × 81 =
  14. 14.12345679 × 18 =
  15. 15.123 × 8 + 3 =
  16. 16.37 × 9 =
  17. 17.12345679 × 45 =
  18. 18.12345679 × 54 =
  19. 19.12345679 × 63 =
  20. 20.12345678 × 8 + 8 =
  21. 21.1111 × 1111 =
  22. 22.1234567 × 9 + 8 =
  23. 23.37 × 3 =
  24. 24.12345678 × 9 + 9 =
  25. 25.37 × 6 =
  26. 26.111111 × 111111 =
  27. 27.1234 × 9 + 5 =
  28. 28.12345 × 9 + 6 =
  29. 29.37 × 21 =
  30. 30.123 × 9 + 4 =
  31. 31.1234567 × 8 + 7 =
  32. 32.123456 × 9 + 7 =
  33. 33.12345679 × 9 =
  34. 34.37 × 18 =
  35. 35.12 × 8 + 2 =
  36. 36.12345 × 9 + 6 =
  37. 37.12345679 × 36 =
  38. 38.123456789 × 8 + 9 =
  39. 39.1234 × 8 + 4 =
  40. 40.37 × 15 =

Answer key

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

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