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1500 questions
36
votes
4 answers
Display a number using a scientific calculator with most keys are stuck
Your have a scientific calculator such that most of the keys are unable to be pressed. The only keys that work are those for the functions
$$
x^2 \;\;
\sqrt{x} \;\;
x!\;\;
\exp\;\;
\ln\;\;
\sin\;\;
\cos\;\;
\tan\;\;
…
jinha0001
- 461
- 4
- 3
36
votes
3 answers
Is this more than a packing puzzle?
I bought this set of wooden blocks at a garage sale today, and although it was a challenge to fit them in the box, I suspected they were more than just a packing puzzle. Can you guess what else they are used for?
Hint 1:
There are 32 blocks in…
Don Kirkby
- 2,602
- 12
- 22
36
votes
6 answers
Chasing pirates
You are asleep on your boat on open sea. When you wake up you discover you have been robbed. A quick inspection of security cam footage reveals that the pirates who robbed you left your ship exactly an hour ago. The sea is flat, extends…
Johannes
- 4,392
- 19
- 43
36
votes
1 answer
Can you follow Directions?
Unemployed? Lk no further!
Are you:
Able to follow directions?
Able to read Flowcharts?
Highly motivated?
Able to count on your hands and feet without utilizing your big toes and thumbs?
Well then,
This Is The Job For You!
Simply answer the…
Chowzen
- 25,660
- 5
- 57
- 220
36
votes
13 answers
Anagrams: From Food to Food
A challenge a friend and I came up with to entertain ourselves, but found a little too taxing:
Find 5 single word foods (i.e. comestibles or dishes) whose letters can be reshuffled to give another single word food.
We managed to find two:
LEMON…
Sachin Valera
- 462
- 4
- 10
36
votes
12 answers
An invisible traveller
Maybe not a typical riddle, but here it is:
I can travel from there to here by disappearing, but I can also travel from here to there by appearing.
What am I?
Maniraj
- 2,158
- 9
- 28
36
votes
9 answers
Film plots explained badly
Everybody slept for most of the movie.
An Apple computer discovered some plant and eventually make everyone do exercise.
It’s a Shakespeare adaptation but with cats and monkeys.
90+ year old government employee convinced a group of friends to…
Chess960
- 3,286
- 1
- 13
- 41
36
votes
3 answers
What country am I? A 'Riley Riddle'
My prefix can be seen in the Greek alphabet,
My suffix is a kind of tree,
And my infix is something used to kiss.
What country am I?
Dranier
- 997
- 6
- 19
36
votes
2 answers
How to get water from numbers?
With six, I'm a few of your counterfeit pounds.
With twelve, in your body, and a body of water.
With eighteen, a body of water to clear the ground.
With twenty-two, taking a car swimming in a body of water.
With twenty-seven or thirty-eight, I'm…
Rand al'Thor
- 116,845
- 28
- 322
- 627
36
votes
1 answer
Lolcat Steganography: Find the message hidden within the transport medium of humorous feline photography
The Bad Guys (curse them!) have begun communicating in lolcats, to enable their Internet communications to take place unnoticed.
This is a job for the NSA/GCHQ crack team of cryptanalysts.
Unfortunately they're a bit busy today,…
A E
- 8,802
- 5
- 41
- 81
36
votes
1 answer
✯ Familiar Faces ✯ \(^ヮ^)/
I invited a bunch of people to a small party:
A. ㇏(う_う)ﾉ
B. (°ヘ°)
C. (イ◠‿◠)
D. ¯\_(シ)_/¯
E. (メ°皿°)ﾉ
Everyone made it and we all had a great time.
I was the second person in the room. She came first, he was last and you came just before…
Ambo100
- 1,221
- 1
- 9
- 22
36
votes
3 answers
You've got an 11.111111% chance to solve this!
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mi9ed q35khMvooe H7r wekd.
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v3avlby I7Yazplen p1yw
eqnwtfcx2t rdg xtieiwy rafee yTthf6dnrt2d awr iyes afhw
dteutph aahyh ah nodlo…
Mister B
- 1,442
- 7
- 13
36
votes
12 answers
Batman vs 4 villains
One day after having his morning Bat-coffee, Batman received the following message on his Bat-computer:
Hello there Dark Knight. I, the Riddler, along with Joker, Two-Face, and Penguin, are preparing to pull off the heist of the century. But before…
Saladani
- 636
- 6
- 13
36
votes
5 answers
Measure 22 minutes with 7 and 13 minute hourglasses
You have two hourglass timers. One can measure 7 minutes and the other hourglass timer can measure 13 minutes. This means that it takes 7 minutes for the sand timer to completely empty the sand from one portion to the other.
Your task is to measure…
Oray
- 30,307
- 6
- 61
- 215
36
votes
3 answers
The Determinant Sudoku
The determinants of $2\times 2$ matrices are calculated this way:
$$\det\begin{bmatrix}a & b \\c & d \end{bmatrix}=ad-bc$$
And here's the sudoku-determinant puzzle:
What's the solution for this sudoku?
The original puzzle can be found here,…
MCCCS
- 685
- 8
- 20