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All Puzzles

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3 likes 3.5
(Fairly Easy)
A Guess-my-rule Problem in Mathematics
Guess the rule: 1254 is 13 4097 is 36 1111 is 2 2222 is 8 3478 is 53 1010 is 1 ...
Added 19 days ago by GreatGray currently with 0 comments
4 likes 2.8
(Fairly Easy)
three prisoners in Logical
there are three prisoners one can see fine one can see out of one eye and one is total...
Added 21 days ago by makaylasdad2003 currently with 3 comments
4 likes 3.7
(Fairly Easy)
Attic Light Switch in Logical
A downstairs panel contains three on-off switches. One of them controls the lamp in you...
Added 23 days ago by vette982 currently with 2 comments
4 likes 4.0
(Moderate)
Clock Hands - Google Interview Question in Logical
How many degrees are there in the angle between the hour and minute hands of a clock wh...
Added 23 days ago by copter currently with 1 comment
4 likes 5.0
(Moderate)
I enjoy Random Walks on the Beach in Mathematics
There is a MxN grid (see picture) of spots. You start from the top left spot and go to...
Added 2 months ago by kash currently with 1 comment
6 likes 5.0
(Moderate)
Balloon in an Elevator in Unsolved MindCiphs
A person is holding on to a helium balloon in an elevator. The elevator cable snaps, an...
Added 2 months ago by vette982 currently with 23 comments
11 likes 2.9
(Fairly Easy)
What number is next? in Mathematics
What number comes next in this sequence? 4, 20, 56, 120, 220, ?
Added 4 months ago by ace currently with 15 comments
7 likes 3.8
(Fairly Easy)
Betsy and Patsy in Lateral Thinking
"We were born on the same day of the same year," said Betsy. "And we have the same mot...
Added 4 months ago by Valentin currently with 2 comments
4 likes 2.2
(Fairly Easy)
Hit the Target in Mathematics
Jim hits the target 90 out of 100 times. Charlie hits the target 80 out of 100 times...
Added 4 months ago by kash currently with 2 comments
4 likes 5.0
(Moderate)
What do these words have in common? in At the Campfire
What do these words have in common? AS, HOSE, TIER, SALE
Added 4 months ago by kash currently with 4 comments
3 likes 5.5
(Moderate)
Pronouns in At the Campfire
The word CHEWED contains two complete pronouns in letter order: HE and WE. Find a 6-...
Added 4 months ago by kash currently with 2 comments
3 likes 3.0
(Fairly Easy)
Beverages in Mathematics
You have only 4 different kinds of beverages in bottles of equal capacity. You have unl...
Added 4 months ago by raki currently with 2 comments
11 likes 4.0
(Moderate)
Cooking Time in Logical
A cook must put a souffle exactly 9 minutes at the oven, but he only have a 7 minutes h...
Added 5 months ago by luis currently with 8 comments
10 likes 6.3
(Challenging)
Birthday Problem (Classic) in Mathematics
A classic problem. How many people do you need to have in a room so that the probabi...
Added 5 months ago by Dusty currently with 0 comments
12 likes 5.5
(Moderate)
Divide 1 to 20 in Mathematics
What is the smallest whole number that can be divided by any number from 1 to 20 (inclu...
Added 5 months ago by Dusty currently with 4 comments