You enter a dim room with a desk. On the desk lie three items: a box of matches, an oil lamp, and a candle. You have only one single match in your hand. What must you light first to illuminate the room effectively?
The match
Before you can light the lamp or the candle to produce lasting illumination, you must strike and ignite your single match.
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
You are presented with three jars labeled 'Red Marbles', 'Blue Marbles', and 'Mixed Marbles'. Every single jar is labeled incorrectly. You may draw just one marble from one jar without looking inside. Which jar should you sample from to determine the correct label for all three jars?
Five knights stand in a circle facing inward. Each knight has a distinct color shield: Red, Blue, Green, Yellow, and Silver. The Red knight is directly opposite the Blue knight. The Green knight is to the immediate right of the Red knight. The Yellow knight is not adjacent to the Blue knight. Where does the Silver knight stand?
I have keys but open no locks. I have space but no empty rooms. You can enter, but you cannot step inside. What am I?
Three boxes are labeled: 'Apples', 'Oranges', and 'Apples and Oranges'. Every single box is labeled incorrectly. You are allowed to draw only one fruit from one box to fix all the labels. Which box do you choose to draw from?
The flag is bigger than the parade float, and the firework is bigger than the flag. Which one is the middle size?
Three boxes contain fruit. One has apples, one has oranges, and one has both apples and oranges. Every single box is labeled incorrectly. You may reach into one box and pull out a single piece of fruit without looking. Which box should you pick to correctly label all three boxes?