← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 156 · 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. 1.123 × 8 + 3 =
  2. 2.12345679 × 63 =
  3. 3.11 × 11 =
  4. 4.12345679 × 18 =
  5. 5.37 × 6 =
  6. 6.12345679 × 54 =
  7. 7.11111 × 11111 =
  8. 8.12345678 × 8 + 8 =
  9. 9.1234 × 8 + 4 =
  10. 10.37 × 21 =
  11. 11.37 × 9 =
  12. 12.123 × 9 + 4 =
  13. 13.1234567 × 9 + 8 =
  14. 14.12345679 × 81 =
  15. 15.12345679 × 27 =
  16. 16.111111 × 111111 =
  17. 17.37 × 24 =
  18. 18.37 × 18 =
  19. 19.37 × 12 =
  20. 20.1111 × 1111 =
  21. 21.123456 × 9 + 7 =
  22. 22.12 × 9 + 3 =
  23. 23.1234567 × 8 + 7 =
  24. 24.111 × 111 =
  25. 25.37 × 3 =
  26. 26.123456789 × 8 + 9 =
  27. 27.12345 × 8 + 5 =
  28. 28.12345678 × 9 + 9 =
  29. 29.12345679 × 72 =
  30. 30.12345 × 9 + 6 =
  31. 31.12345679 × 36 =
  32. 32.12 × 8 + 2 =
  33. 33.37 × 15 =
  34. 34.12345679 × 45 =
  35. 35.12345679 × 9 =
  36. 36.123456 × 8 + 6 =
  37. 37.111111 × 111111 =
  38. 38.12345679 × 18 =
  39. 39.123 × 9 + 4 =
  40. 40.1234 × 9 + 5 =

Answer key

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

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