← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 989 · 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 × 6 =
  2. 2.12345679 × 72 =
  3. 3.12345679 × 9 =
  4. 4.12345 × 9 + 6 =
  5. 5.123456789 × 8 + 9 =
  6. 6.123 × 8 + 3 =
  7. 7.12345679 × 27 =
  8. 8.11111 × 11111 =
  9. 9.12345 × 8 + 5 =
  10. 10.37 × 21 =
  11. 11.12345679 × 36 =
  12. 12.37 × 12 =
  13. 13.12 × 9 + 3 =
  14. 14.12345679 × 63 =
  15. 15.1234567 × 8 + 7 =
  16. 16.37 × 18 =
  17. 17.12345679 × 18 =
  18. 18.1111 × 1111 =
  19. 19.1234 × 9 + 5 =
  20. 20.12345679 × 45 =
  21. 21.1234567 × 9 + 8 =
  22. 22.11 × 11 =
  23. 23.12345678 × 8 + 8 =
  24. 24.111111 × 111111 =
  25. 25.123 × 9 + 4 =
  26. 26.12345679 × 54 =
  27. 27.111 × 111 =
  28. 28.37 × 27 =
  29. 29.1234 × 8 + 4 =
  30. 30.12345679 × 81 =
  31. 31.123456 × 9 + 7 =
  32. 32.37 × 3 =
  33. 33.37 × 15 =
  34. 34.12 × 8 + 2 =
  35. 35.11111 × 11111 =
  36. 36.12345678 × 9 + 9 =
  37. 37.12 × 9 + 3 =
  38. 38.37 × 24 =
  39. 39.123456 × 8 + 6 =
  40. 40.12345679 × 36 =

Answer key

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

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