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Logical

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10 likes 5.6
(Moderate)
Coin Flip in Logical
On Monday, you flip a coin all day. You start flipping it until you see the pattern He...
Added about 1 year ago by kash currently with 32 comments
17 likes 5.7
(Moderate)
The Bookworm in Logical
Looking onto a shelf you see three books each labeled Volume 1, Volume 2, and Volume 3 ...
Added about 1 year ago by Tsion currently with 21 comments
14 likes 6.2
(Challenging)
The Monty Hall Problem in Logical
This problem has numerous variations and its various forms has stumped many mathematici...
Added over 2 years ago by johnp currently with 53 comments
9 likes 6.3
(Challenging)
Cracking the Safe in Logical
You are to open a safe without knowing the combination. Beginning with the dial set at ...
Added about 1 year ago by johnp currently with 32 comments
10 likes 6.5
(Challenging)
Fork in the road in Logical
You are walking down a road and arrive at a fork that splits the road into two separate...
Added about 1 year ago by city_slick currently with 38 comments
12 likes 6.7
(Challenging)
The Neighbourhood in Logical
People say Einstein suggested that 98% of the world's population couldn't figure out th...
Added about 1 year ago by ace currently with 36 comments
11 likes 6.9
(Challenging)
Happy Handshaking in Logical
Jack and his wife went to a party where four other married couples were present. Every ...
Added about 1 year ago by vette982 currently with 46 comments
15 likes 7.1
(Challenging)
12 Identical Balls in Logical
You have 12 identical balls. One of them is slightly different in weight than the rest...
Added about 1 year ago by kash currently with 49 comments
19 likes 7.4
(Challenging)
The Number Problem in Logical
What does 3685=? 8809=6 7111=0 2172=0 6666=4 1111=0 3213=0 7662=2 8096=5 931...
Added about 1 year ago by Tsion currently with 41 comments
23 likes 7.5
(Challenging)
Cards With Crosses in Logical
You have a stack of 23 cards. Each card has an image of a cross on one side, and an ima...
Added about 1 year ago by jaX currently with 33 comments
9 likes 7.8
(Challenging)
Marble Weights in Logical
You are given a set of scales and 12 marbles. The scales are of the old balance variety...
Added about 1 year ago by jaX currently with 43 comments
27 likes 9.2
(Impossible.)
Three Idols in Logical
Classic: Three gods A, B, and C are called, in some order, True, False, and Random. T...
Added about 1 year ago by M2JOHNSON currently with 70 comments