← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 167 · 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. 1.12345678 × 9 + 9 =
  2. 2.12345679 × 18 =
  3. 3.37 × 12 =
  4. 4.1234567 × 9 + 8 =
  5. 5.12345679 × 72 =
  6. 6.37 × 27 =
  7. 7.123 × 8 + 3 =
  8. 8.12345679 × 81 =
  9. 9.11111 × 11111 =
  10. 10.12345679 × 9 =
  11. 11.37 × 6 =
  12. 12.1234 × 9 + 5 =
  13. 13.111111 × 111111 =
  14. 14.123 × 9 + 4 =
  15. 15.37 × 24 =
  16. 16.11 × 11 =
  17. 17.12345679 × 36 =
  18. 18.1111 × 1111 =
  19. 19.37 × 18 =
  20. 20.123456 × 9 + 7 =
  21. 21.12 × 9 + 3 =
  22. 22.12345679 × 27 =
  23. 23.12345679 × 63 =
  24. 24.37 × 21 =
  25. 25.1234 × 8 + 4 =
  26. 26.12 × 8 + 2 =
  27. 27.12345 × 9 + 6 =
  28. 28.123456789 × 8 + 9 =
  29. 29.37 × 3 =
  30. 30.111 × 111 =
  31. 31.111 × 111 =
  32. 32.12345679 × 45 =
  33. 33.12345 × 8 + 5 =
  34. 34.37 × 15 =
  35. 35.12345679 × 54 =
  36. 36.37 × 9 =
  37. 37.123456 × 8 + 6 =
  38. 38.1234567 × 8 + 7 =
  39. 39.12345679 × 18 =
  40. 40.12345678 × 8 + 8 =

Answer key

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

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