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Puzzles / Riddles

Puzzles and riddles are statements and questions framed such that they require ingenuity and imagination to resolve. Most are mathematical conundru...

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xyzThere java challenge

bygudii9
153
Hi,
I am working on below challenge
http://codingbat.com/prob/p136594
I tried my code as below
Post

Here's an interesting brain teaser / programming puzzle I …

3
Here's an interesting brain teaser / programming puzzle I learned the other day. The answer can be …
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Puzzle

byRIAS
100
Hello experts,

A man leaves his beach house at 8am Saturday and walks up a hill, reachingthe …
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ZERO.

81
What is the meaning of having ZERO as the denominator?
What does  ( 1 / 0 ) one divided by zero / …
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Plans of home buyer - builder

bynickg5
3

Intention of that house to you, waiting until new is ready, new is waiting to get wired. Your shed

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How to open this screw

37
I have an extension cord broken and I want to repair it.
It is closed with special head screws, …
Post

Here's an interesting coding puzzle:  A trader can perform…

Here's an interesting coding puzzle:

A trader can perform two buys and two sells in a day of a …
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Exam question

48
Down here in NZ students have just recently sat a horrible algebra paper.  It appears that the …
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slogan contest

34
I have to assign a suitable website slogan for a newly built intranet website. The company is …
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Pet Food Recall

43
Pet Food Recall .....  This is to compile and stay in front of the ever-growing list of contaminated…
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Logical reasoning – Test #3

23
I took lately a test of logical reasoning, made by IBM, and were 2-3 questions where I had …
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The early bird

13

Hi riddlers!


Let me see if this EE category is still being visited :-)

Here's a great riddle, I think.

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prove A+BC =(A+B)(A+C)

27
prove A+BC =(A+B)(A+C)
Research Solution

The perfect fit

6

Another little puzzle. If you solve this one, you might like my next one, too.


Take 7 coins of equal

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Prisoner's Dilemma

33
I have recently come across several references to this (Prisoner's Dilemma) and I'm finding it …
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Word or expression

23
I miss a word. It is somewhere deep in my mind and I cannot take it out.
I need a brainstorming to …
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What is the best way to go about using Cryptanalysis to decrypt a message?

21
I have a message that I need to decrypt (for learning purposes). We are given the Cyphertext and …
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wordsWithoutList  challenge

bygudii9
24
Hi,

I am working on below challenge
http://codingbat.com/prob/p183407

Psedo code:
1. create …
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Pendulum in an accelerating car

27
Dear Experts,

My question is, 'WHY exactly does a pendulum move to one side in an accelerating …

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