← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 748 · 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. 1.1234 × 8 + 4 =
  2. 2.12345679 × 72 =
  3. 3.12345679 × 36 =
  4. 4.111 × 111 =
  5. 5.37 × 24 =
  6. 6.11 × 11 =
  7. 7.1111 × 1111 =
  8. 8.123456789 × 8 + 9 =
  9. 9.37 × 3 =
  10. 10.123 × 8 + 3 =
  11. 11.111111 × 111111 =
  12. 12.1234567 × 9 + 8 =
  13. 13.12345679 × 9 =
  14. 14.123456 × 8 + 6 =
  15. 15.12345679 × 18 =
  16. 16.37 × 21 =
  17. 17.12345678 × 9 + 9 =
  18. 18.37 × 18 =
  19. 19.12345679 × 63 =
  20. 20.12345679 × 45 =
  21. 21.123 × 9 + 4 =
  22. 22.37 × 12 =
  23. 23.12 × 9 + 3 =
  24. 24.37 × 15 =
  25. 25.37 × 27 =
  26. 26.12345 × 8 + 5 =
  27. 27.37 × 9 =
  28. 28.12345679 × 27 =
  29. 29.11111 × 11111 =
  30. 30.1234567 × 8 + 7 =
  31. 31.12 × 8 + 2 =
  32. 32.12345679 × 54 =
  33. 33.37 × 6 =
  34. 34.1234 × 9 + 5 =
  35. 35.12 × 8 + 2 =
  36. 36.12345 × 9 + 6 =
  37. 37.12345678 × 8 + 8 =
  38. 38.12345679 × 72 =
  39. 39.12345679 × 81 =
  40. 40.123 × 8 + 3 =

Answer key

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

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