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.
Riddle10 blog
The Riddle10 blog
The Riddle10 blog explains riddles and puzzles one step at a time. Read why the answer to a well-known riddle works, try sets of original riddles with answers, or learn a method for logic grids, number sequences, cube nets and other classic types. Each guide uses a worked example, and the history section looks at where puzzles come from and what makes them hard.
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.
22 Logic, Number and Word Riddles With Answers
22 original logic, number and word riddles sorted from easy to hard: mazes, gears, code locks, number patterns and letter codes. Answers hidden.
25 Easy and Medium Riddles for Adults, With Answers
25 original easy and medium riddles for adults: logic, numbers, words and pictures. A gentle warm-up for a short break, with every answer hidden.
21 Picture Puzzles and Spatial Riddles With Answers
21 original picture and spatial puzzles: fold, roll, trace, count and spot the change. Sorted from easy to hard, with every answer hidden.
How to Solve Riddles: A Step-by-Step Method
A seven-step method for solving riddles: read twice, split the clues, name the type, question plain words, and test every answer. Worked examples.
How to Solve Water Jug Puzzles, Step by Step
Solve two-jug water puzzles with one loop: fill, pour, empty, repeat. Learn which amounts are possible, how to find the fewest moves, and practise.
History of Puzzles: Six Classic Puzzles and Where They Came From
A short history of puzzles: eight queens in 1848, the 15-puzzle from the 1870s, the 70 square, coin weighing, truth-tellers and colour cubes.