Five numbered cups (1 through 5) sit in order from left to right. A coin is hidden under an even-numbered cup. If you multiply the cup number immediately to its left by the cup number immediately to its right, the product is 3. Which cup holds the coin?
Cup 2
The even-numbered cups are 2 and 4. For Cup 2, the neighboring cups are 1 and 3 (product: 1 × 3 = 3). For Cup 4, the neighbors are 3 and 5 (product: 3 × 5 = 15). Thus, the coin is under Cup 2.
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: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
More logic riddles
The butterfly is bigger than the seed, and the bird is bigger than the butterfly. Which one is the middle size?
A water lily doubles in size every single day. If it takes 30 days for the lily to completely cover an entire pond, how many days did it take for the lily to cover exactly half of the same pond?
Four runners—Alex, Blake, Chris, and Devon—finish a race. Devon crosses the line before Alex. Alex crosses before Blake. Chris crosses after Blake. Who takes third place?
I am a two-digit number. My tens digit is three times my units digit. If you reverse my digits, the new number is 36 less than my original value. What number am I?
Look at this sequence of numbers: 2, 4, 8, 16, 32, __. What is the next number?
Four friends—Ben, Cara, Anna, and Dan—sit in a row of four chairs numbered 1 to 4 from left to right. Ben occupies an end seat. Dan sits immediately to Anna's right. Cara sits somewhere to Dan's left. Anna cannot sit adjacent to Ben. What is the left-to-right sequence of friends?