Crack the Lock Riddle: Which 3-Digit Code Opens It? Answer: 738
The code is 738. Learn how the gold dots and rings rule digits in and out, and the order that makes code lock riddles quick to solve.
Riddle10 blog
Riddle answers
Answers to well-known riddles, explained step by step.
Each article here takes one riddle and shows why its answer works. You get the riddle, the answer, a short proof, the wrong answers people often give and why they fail, and a link to try the riddle on Riddle10 yourself.
Start here: three chests riddle, melon weight riddle, fold the net riddle
The Three Fruits Logic Riddle: Which Fruit Does Huda Have?
Huda has the fig. See how two short clues settle all three fruits, and how to solve small matching riddles with a grid.
Roll the Cube Riddle: Which Symbol Is on Top at the End?
The triangle ends on top. Follow the cube roll by roll along the path, plus a shortcut for rolling cube riddles that saves most of the work.
Fold the Net Riddle: Which Cube Folds From This Net? Answer: B
Cube B is the answer. Learn how to fold a cube net in your head, which faces end up opposite each other, and why cubes A, C and D cannot be made.
Three Level Scales Riddle: How Many Circles Balance the Last?
The answer is 5 circles. See how three level scales show that a square weighs 2 circles and a triangle 3, and why 2, 3 and 6 are wrong.
I Grow in the Field Riddle: The Answer Is Wheat
The answer is wheat. Drop the W for heat, drop the H for eat. See why wheat fits all three clues and which guesses fall short.
Three Chests Riddle: Only One Label Is True. Which Chest?
The treasure is in the silver chest. A three-row table proves it: only silver leaves exactly one true label. See why gold and bronze fail.
Melon Weight Riddle: 2 kg Plus a Third of Its Own Weight
The melon weighs 3 kg. The 2 kg is the other two thirds, so one third is 1 kg. See the slice method, the algebra and the usual wrong answers.
Fence Post Riddle: Why a 15 m Fence Needs 6 Posts
A straight 15 m fence with a post every 3 m needs 6 posts, not 5. Learn the gaps-plus-one rule, when it changes, and where the same trap hides.
Which Number Is Spelled in Alphabetical Order? Riddle Answer
The answer is forty. F, O, R, T, Y climb through the alphabet with no step back. See the check, why no other number works, and the usual slips.