← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 527 · 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 × 15 =
  2. 2.1234 × 8 + 4 =
  3. 3.123456 × 8 + 6 =
  4. 4.12345678 × 8 + 8 =
  5. 5.12345 × 8 + 5 =
  6. 6.37 × 27 =
  7. 7.12345 × 9 + 6 =
  8. 8.1234567 × 8 + 7 =
  9. 9.11111 × 11111 =
  10. 10.12345679 × 18 =
  11. 11.111111 × 111111 =
  12. 12.12345678 × 9 + 9 =
  13. 13.37 × 24 =
  14. 14.37 × 12 =
  15. 15.12345679 × 72 =
  16. 16.12345679 × 9 =
  17. 17.123 × 8 + 3 =
  18. 18.1234 × 9 + 5 =
  19. 19.12345679 × 27 =
  20. 20.12345679 × 63 =
  21. 21.12 × 8 + 2 =
  22. 22.37 × 9 =
  23. 23.111 × 111 =
  24. 24.1234567 × 9 + 8 =
  25. 25.12345679 × 54 =
  26. 26.12345679 × 36 =
  27. 27.37 × 18 =
  28. 28.12345679 × 81 =
  29. 29.123456789 × 8 + 9 =
  30. 30.123 × 9 + 4 =
  31. 31.1111 × 1111 =
  32. 32.11 × 11 =
  33. 33.12345 × 9 + 6 =
  34. 34.37 × 6 =
  35. 35.37 × 21 =
  36. 36.12345679 × 45 =
  37. 37.37 × 3 =
  38. 38.11111 × 11111 =
  39. 39.123456 × 9 + 7 =
  40. 40.12345678 × 8 + 8 =

Answer key

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

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