I grow smaller the more I heavy I become, and I disappear entirely when my work is finished. What am I?
An ice sculpture or a bar of soap
As a bar of soap is used and becomes heavier with lather and water, it dissolves and shrinks until nothing is left once its cleaning job is complete.
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
Five runners finish a school marathon, and only these facts survive. Gwen finished ahead of Luca. Aria finished ahead of Jonas. Luca finished ahead of Aria. Jonas finished ahead of Dmitri. Who finished first?
Four friends named Red, Blue, Green, and Yellow each wear a shirt matching one of those four colors. No person wears a shirt matching their own name. Green wears the Red shirt, and Yellow wears the Green shirt. What shirt is Red wearing?
Four people—Alex, Blair, Casey, and Drew—are sitting around a square table, one on each side. Alex is sitting directly across from Casey. Blair is sitting to the immediate right of Alex. Who is sitting directly across from Blair?
A drawer contains 10 black socks and 10 white socks mixed together in total darkness. What is the minimum number of socks you must pull out to guarantee you have at least one matching pair of any color?
Three boxes are labeled 'Apples', 'Oranges', and 'Apples and Oranges', but every single label is guaranteed to be wrong. You are allowed to draw only one fruit from the box labeled 'Apples and Oranges'. After looking at that fruit, how can you correctly label all three boxes?
Three guards stand before a fortress gate. One always tells the truth, one always lies, and one alternates between truth and lies. You can ask one yes/no question to each guard in any order. What is the minimum number of guards you must question to guarantee identifying the liar?