← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 274 · 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. 2.37 × 24 =
  3. 3.37 × 27 =
  4. 4.123 × 8 + 3 =
  5. 5.12345679 × 27 =
  6. 6.1234567 × 8 + 7 =
  7. 7.123456 × 9 + 7 =
  8. 8.37 × 15 =
  9. 9.37 × 6 =
  10. 10.12 × 8 + 2 =
  11. 11.12345679 × 54 =
  12. 12.11 × 11 =
  13. 13.12 × 9 + 3 =
  14. 14.12345679 × 18 =
  15. 15.12345679 × 36 =
  16. 16.123 × 9 + 4 =
  17. 17.12345678 × 9 + 9 =
  18. 18.12345678 × 8 + 8 =
  19. 19.12345679 × 9 =
  20. 20.1234 × 9 + 5 =
  21. 21.1234567 × 9 + 8 =
  22. 22.123456789 × 8 + 9 =
  23. 23.12345 × 9 + 6 =
  24. 24.111111 × 111111 =
  25. 25.12345 × 8 + 5 =
  26. 26.1111 × 1111 =
  27. 27.111 × 111 =
  28. 28.12345679 × 72 =
  29. 29.12345679 × 63 =
  30. 30.11111 × 11111 =
  31. 31.12345679 × 81 =
  32. 32.37 × 9 =
  33. 33.37 × 18 =
  34. 34.37 × 3 =
  35. 35.12345679 × 45 =
  36. 36.123456789 × 8 + 9 =
  37. 37.123456 × 8 + 6 =
  38. 38.37 × 12 =
  39. 39.37 × 21 =
  40. 40.37 × 9 =

Answer key

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

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