dr_
  • Member for 6 years, 4 months
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2 answers
22 votes
6k views
6 bookmarks
The village of the liars and truth-tellers
1 answers
19 votes
601 views
1 bookmarks
The volumes of the encyclopedia
7 answers
16 votes
3k views
1 bookmarks
Flashlight and 8 batteries
12 answers
14 votes
4k views
2 bookmarks
A Palindrome Challenge
1 answers
6 votes
491 views
The program in the computer
7 answers
5 votes
7k views
A man married the sister of his widow
1 answers
5 votes
259 views
An island, a boat, and a roulette
9 answers
4 votes
2k views
12 bookmarks
The London safes and their mysterious combinations
3 answers
4 votes
250 views
"Twelve of a times" table
1 answers
0 votes
2k views
The golden chain