# All Questions

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39 views

### Cryptic Family Reunion: Sgt. Sequence Rides Again!

The answer to this puzzle is a list of ten thematically related words or proper names or phrases. Each of these is clued cryptically, and the theme is to be determined. NOTE: While the theme mostly ...
60 views

### Are there Sudokus that are so hard that no known logical deduction techniques can reduce it? [duplicate]

Are there Sudokus that are so hard that no known logical deduction techniques can reduce it? Maybe such a technique would reduce away multiple options?
89 views

### What kind of car do I have?

What kind of car do I have? The clue words: stories, robbery, rock, minimum, old, ducks
88 views

### A puzzle with seventy-two countries

Let's have two groups of countries. Each group has 36 countries. The first letter of the countries in the first group start with A,B,C,E,G,S. The second group of countries has as first letter T,I,K,L,...
122 views

### What is the shortest English–language sentence which contains 25 unique letters? [closed]

There is a lot of literature on the subject of short English pangrams, that is, sentences that contain every letter. But I am curious what the shortest, or at least some of the shortest, sentences are ...
334 views

### Falling out with the Judge II

All by oneself: thrown out car, rotten feed, and amount of food found outside bird's house (18) The bird was never found again, and no fingerprints could be found on the car or the food. What ...
83 views

### A quick Riley Riddle

My prefix is a term for individuals of a certain gender My suffix is a particle with an electron owed My infix is a misnomer for ASCII code And I am a sprawling abode What am I?
70 views

### Show that : $n =E(n*LOG((10*n)/(1+n))+1)$, $n> 0$, n integer? [closed]

Show that $$n =E(n*LOG((10*n)/(1+n))+1)$$ for $n> 0$ , $n$ is integer and E integer part(The ENT function on excel).
60 views

### speed and acceleration of car [closed]

There is a road with length l meters. The start of the road has coordinate 0, the end of the road has coordinate l. There are two cars, the first standing at the start of the road and the second ...
521 views

### Density in Den Sitting

Please find below a word search puzzle. But it's not just any word search...the words you find cannot be too dense. The definition of a word in this puzzle: appears in /usr/share/dict/words:https://...
421 views

### Tribute to Eugene Varshavsky bwahhahahahahahahah

Each cell in the lower-right 9x9 grid must contain a positive integer or be left blank. Numbers on the outside of the grid indicate the sums of one or more adjacent digits in that row or column, in ...
101 views

581 views

### Covid19 puzzle - count of people in a mall [closed]

There is a mall with 4 entrances, in each entrance is standing a doorman with a counter who counts the amount of people who entered through that entrance. If the counter reaches 200, the doorman ...
132 views

### 3 switches and 4 lights

The are three switches (1, 2 and 3) and four lights (A, B, C and D). Each switch turns on exactly two lights and no two switches turn on identical lights. You know that Lights A, B and C are on when ...