If five machines take five minutes to make five widgets, how long does it take one hundred machines to make one hundred widgets?
5 minutes
Each machine takes 5 minutes to make one widget. If you have 100 machines running simultaneously, they will each make one widget in that same 5-minute window.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
More logic riddles
I am a five-letter word. If you remove my first letter, I become a sound made by a cat. If you remove my first two letters, I become a preposition of position. What word am I?
I am a two-digit whole number. My tens digit is double my units digit. If you add my digits together, you get 12. What number am I?
A farmer needs to measure out exactly 4 liters of water using only an unmarked 3-liter jug and an unmarked 5-liter jug. What is the minimum number of steps to get 4 liters in the 5-liter jug?
Three gods, A, B, and C, are called, in no particular order, True, False, and Random. True always speaks the truth, False always lies, and Random answers randomly. You can ask three yes-no questions to any combination of gods. What is the minimum number of questions needed to identify all three?
In a secret society, every member is either a Truth-teller (who always tells the truth) or a Liar (who always lies). You meet two members, X and Y. X says, 'We are both Liars.' What are X and Y?
In a digital vault, a password consists of a four-digit number where the first digit equals the number of zeros in the entire code, the second digit equals the number of ones, the third equals the number of twos, and the fourth equals the number of threes. What is the code?

