Disk colour riddle
1,074.5K Views
Imagine a disk spinning like a record player turn table. Half of the disk is black and the other is white. Assume you have an unlimited number of colour sensors. How many sensors would you have to place around the disk to determine the direction the disk is spinning? Where would they be placed?
You only need two and they should NOT be placed at opposite sides.
Your Answer
More puzzles to try-
Ninety One Riddle
Below equation is true. 8 + 8 = 91 How ?Read More »Ants confused for stupid reason riddle
The Little ant seems to be always confused. You know why ?Read More »Lighter than the feather riddle
What is lighter than a feather but the world’s strongest man can’t hold for Long?Read More »Christina’s Profit Count
Christina purchased a portable music player for $100 through a deal. She sold it to Sindy for $125. After a ...Read More »Car and key hide-and-seek
In a room are three boxes that on the outside look identical. One of the boxes contains a car, one ...Read More »Twice in a month riddle
what is thing which comes once in a year, twice in a month, four times in a week and six ...Read More »How many would he have in the first field?
A farmer has three fields. One of them has 3 bundles of hay, another has 4, and the last has ...Read More »The Doctor with Sick Snake
Why did the doctor take his time with the sick snake?Read More »3 Switches and Light bulb Puzzle
There are 3 standard on/off switches outside a room. One (and only one) controls a light bulb inside the room ...Read More »Magical Maths
We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol ...Read More »THE GAME OF CATS AND MICE
A number of cats got together and decided to kill between them 999919 mice. Every cat killed an equal number ...Read More »Find the car key
A car key is hidden in the picture. Can you spot it.? Quickly test your eye power now!Read More »How many bounces will the ball take?
Donald Duck throws a ball from a 90 feet building. The ball is quite bouncy and when it hits the ...Read More »Came in Night
It welcomes the day with a show of light, came here in the night. It bathe the earthy stuff at ...Read More »Pills Puzzle
Two bottles consist of different pills each. You must take the two pills at the same time and if you ...Read More »Dollar and Cent Riddle
I went to the bookshop and spent one-half of the money that was in my purse. When I came out, ...Read More »Form the Word
It is an eleven letter word. The first, second, third and fourth letters form a banquet’s name. The fifth, sixth ...Read More »Drop from tallest building riddle
if You drop him from the tallest building it is fine, but if you drop him in water he wil ...Read More »Unlock the Cipher
Decode below rebus D N A T S , DRead More »Number Games
Fill in the boxes with numbers from 1-10. One number can be used only once.Read More »
Accenture Interview PuzzlesAdobe Interview PuzzlesAge RiddleAkbar Birbal PuzzlesAlgorithm PuzzlesAlphabet riddleAmazon Interview PuzzlesAnalytical MathematicsAptitude PuzzleBank PuzzlesBetting PuzzlesBrain TeasersCalendar PuzzlesCards PuzzlesChess Board PuzzleChess PuzzlesChristmas Puzzlecipher PuzzleCivil Services PuzzleClock time puzzleCognizant Interview PuzzlesCoins PuzzleComputational PuzzleconundrumCoronavirus PuzzleCoupondunia Interview PuzzleCritical Thinking Puzzledata analyticsData Structure Interview QuestionsDecode PuzzleDetective PuzzlesDice PuzzleDictionary Riddlesdifficult riddleEasy Math puzzlesEasy puzzlesEinstein puzzleEnglish RiddleFamily Tree Puzzlefamous puzzleFill in the blanks riddlesFinding Killer RiddlesFlipkart interview puzzlesFunny RiddlesGeneral KnowledgeGeographical PuzzleGoogle Code Jam 2014Google Interview PuzzlesGRE PuzzleHard Puzzle