← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 378 · 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. 2.12 × 9 + 3 =
  3. 3.123456 × 8 + 6 =
  4. 4.12345679 × 36 =
  5. 5.37 × 6 =
  6. 6.12345679 × 72 =
  7. 7.12345679 × 45 =
  8. 8.11 × 11 =
  9. 9.123 × 8 + 3 =
  10. 10.111111 × 111111 =
  11. 11.37 × 12 =
  12. 12.12 × 8 + 2 =
  13. 13.12345679 × 18 =
  14. 14.12345 × 9 + 6 =
  15. 15.12345679 × 63 =
  16. 16.12345679 × 81 =
  17. 17.11111 × 11111 =
  18. 18.123456 × 9 + 7 =
  19. 19.12345679 × 9 =
  20. 20.37 × 24 =
  21. 21.37 × 21 =
  22. 22.1111 × 1111 =
  23. 23.1234 × 9 + 5 =
  24. 24.12345679 × 27 =
  25. 25.123456789 × 8 + 9 =
  26. 26.12345 × 8 + 5 =
  27. 27.111 × 111 =
  28. 28.1234567 × 8 + 7 =
  29. 29.12345678 × 9 + 9 =
  30. 30.37 × 9 =
  31. 31.37 × 3 =
  32. 32.12345678 × 8 + 8 =
  33. 33.37 × 15 =
  34. 34.12345679 × 54 =
  35. 35.37 × 27 =
  36. 36.37 × 18 =
  37. 37.123 × 9 + 4 =
  38. 38.123 × 9 + 4 =
  39. 39.37 × 15 =
  40. 40.37 × 9 =

Answer key

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

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