← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 863 · 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. 1.37 × 24 =
  2. 2.37 × 9 =
  3. 3.123 × 9 + 4 =
  4. 4.37 × 3 =
  5. 5.111111 × 111111 =
  6. 6.12345679 × 36 =
  7. 7.1234567 × 9 + 8 =
  8. 8.123 × 8 + 3 =
  9. 9.37 × 12 =
  10. 10.11 × 11 =
  11. 11.12345679 × 45 =
  12. 12.12345 × 9 + 6 =
  13. 13.12345679 × 18 =
  14. 14.12345679 × 27 =
  15. 15.12345 × 8 + 5 =
  16. 16.1234567 × 8 + 7 =
  17. 17.37 × 18 =
  18. 18.12 × 9 + 3 =
  19. 19.111 × 111 =
  20. 20.12345679 × 54 =
  21. 21.123456789 × 8 + 9 =
  22. 22.12345679 × 9 =
  23. 23.12345679 × 63 =
  24. 24.1111 × 1111 =
  25. 25.12345678 × 8 + 8 =
  26. 26.12345679 × 72 =
  27. 27.37 × 21 =
  28. 28.37 × 6 =
  29. 29.11111 × 11111 =
  30. 30.37 × 27 =
  31. 31.12 × 8 + 2 =
  32. 32.1234 × 9 + 5 =
  33. 33.12345678 × 9 + 9 =
  34. 34.1111 × 1111 =
  35. 35.123456 × 9 + 7 =
  36. 36.12345679 × 81 =
  37. 37.123456 × 8 + 6 =
  38. 38.12345678 × 8 + 8 =
  39. 39.12345679 × 36 =
  40. 40.12345679 × 81 =

Answer key

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

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