← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 309 · 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. 1.1234567 × 9 + 8 =
  2. 2.12345679 × 45 =
  3. 3.1234567 × 8 + 7 =
  4. 4.12345679 × 63 =
  5. 5.111111 × 111111 =
  6. 6.123456 × 8 + 6 =
  7. 7.37 × 6 =
  8. 8.37 × 9 =
  9. 9.37 × 27 =
  10. 10.37 × 24 =
  11. 11.12345679 × 9 =
  12. 12.12345679 × 72 =
  13. 13.12345678 × 9 + 9 =
  14. 14.11111 × 11111 =
  15. 15.12345678 × 8 + 8 =
  16. 16.123 × 9 + 4 =
  17. 17.11 × 11 =
  18. 18.1111 × 1111 =
  19. 19.12345679 × 81 =
  20. 20.12345679 × 36 =
  21. 21.37 × 12 =
  22. 22.12345 × 9 + 6 =
  23. 23.12345679 × 27 =
  24. 24.37 × 15 =
  25. 25.12345 × 8 + 5 =
  26. 26.12345679 × 54 =
  27. 27.1234 × 9 + 5 =
  28. 28.1234 × 8 + 4 =
  29. 29.123456789 × 8 + 9 =
  30. 30.12 × 8 + 2 =
  31. 31.111 × 111 =
  32. 32.37 × 3 =
  33. 33.123 × 8 + 3 =
  34. 34.12 × 9 + 3 =
  35. 35.12345679 × 18 =
  36. 36.123456 × 9 + 7 =
  37. 37.37 × 15 =
  38. 38.11111 × 11111 =
  39. 39.12345678 × 9 + 9 =
  40. 40.37 × 3 =

Answer key

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

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