← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 846 · 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. 1.12345679 × 63 =
  2. 2.12345679 × 36 =
  3. 3.37 × 12 =
  4. 4.12345679 × 54 =
  5. 5.12345679 × 81 =
  6. 6.37 × 3 =
  7. 7.123 × 8 + 3 =
  8. 8.12 × 9 + 3 =
  9. 9.12345 × 8 + 5 =
  10. 10.12345679 × 45 =
  11. 11.11111 × 11111 =
  12. 12.111111 × 111111 =
  13. 13.37 × 9 =
  14. 14.12345679 × 9 =
  15. 15.12345678 × 9 + 9 =
  16. 16.37 × 18 =
  17. 17.1234567 × 9 + 8 =
  18. 18.111 × 111 =
  19. 19.37 × 21 =
  20. 20.12345678 × 8 + 8 =
  21. 21.12345 × 9 + 6 =
  22. 22.123456789 × 8 + 9 =
  23. 23.1234 × 9 + 5 =
  24. 24.1234 × 8 + 4 =
  25. 25.37 × 24 =
  26. 26.12345679 × 72 =
  27. 27.12345679 × 27 =
  28. 28.12345679 × 18 =
  29. 29.12 × 8 + 2 =
  30. 30.11 × 11 =
  31. 31.123456 × 9 + 7 =
  32. 32.123 × 9 + 4 =
  33. 33.37 × 6 =
  34. 34.123456 × 8 + 6 =
  35. 35.1111 × 1111 =
  36. 36.37 × 27 =
  37. 37.123 × 8 + 3 =
  38. 38.1234567 × 8 + 7 =
  39. 39.37 × 15 =
  40. 40.11111 × 11111 =

Answer key

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

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