← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 735 · 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. 1.123456 × 8 + 6 =
  2. 2.37 × 27 =
  3. 3.12345 × 9 + 6 =
  4. 4.1111 × 1111 =
  5. 5.111 × 111 =
  6. 6.37 × 9 =
  7. 7.12345679 × 45 =
  8. 8.12345679 × 63 =
  9. 9.12345678 × 8 + 8 =
  10. 10.11 × 11 =
  11. 11.12 × 9 + 3 =
  12. 12.37 × 15 =
  13. 13.12345679 × 18 =
  14. 14.1234567 × 9 + 8 =
  15. 15.1234567 × 8 + 7 =
  16. 16.12345679 × 72 =
  17. 17.12 × 8 + 2 =
  18. 18.37 × 3 =
  19. 19.11111 × 11111 =
  20. 20.12345679 × 36 =
  21. 21.12345 × 8 + 5 =
  22. 22.12345678 × 9 + 9 =
  23. 23.123456789 × 8 + 9 =
  24. 24.123 × 9 + 4 =
  25. 25.37 × 6 =
  26. 26.12345679 × 81 =
  27. 27.1234 × 9 + 5 =
  28. 28.1234 × 8 + 4 =
  29. 29.12345679 × 54 =
  30. 30.12345679 × 9 =
  31. 31.37 × 18 =
  32. 32.123 × 8 + 3 =
  33. 33.37 × 12 =
  34. 34.123456 × 9 + 7 =
  35. 35.37 × 24 =
  36. 36.37 × 6 =
  37. 37.123 × 8 + 3 =
  38. 38.12345679 × 63 =
  39. 39.111111 × 111111 =
  40. 40.12345679 × 63 =

Answer key

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

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