An empty 5-litre jug is filled from a full 8-litre jug. Water left in the larger jug?
13 litres
3 litres
5 litres
8 litres
Trivia for Kids 8–14 · Mixed
Puzzles You Can Prove
Ten fresh questions for ages 8–14 exploring puzzles you can prove. Mixed difficulty with explanations and host verification notes in the import file.
A fence has five posts in a straight row. Gaps between neighbours total…
5
4
6
10
Three stacked rings must move one at a time, never larger onto smaller. Minimum Tower of Hanoi moves?
5
3
7
9
A 4×4 grid has how many 1×1 squares?
20
8
12
16
A route puzzle allows revisiting towns but forbids reusing roads. What should be marked after each move?
The road just used
Only the final town
The shortest road anywhere
Every unvisited town
True or false: A standard 8×8 chessboard has 64 squares in total when all sizes count.
True
False
A path visits each of four towns once. With fixed start and finish, two middle towns can be ordered in…
8 ways
1 way
2 ways
4 ways
A puzzle rule doubles width but keeps height fixed. A rectangle's perimeter…
Stays fixed
Cannot be determined numerically without dimensions
Always halves
Always doubles
Why is a maze with a loop different from a branching tree maze?
Some places have more than one connecting route
It cannot have an exit
Every wall is curved
It must be larger
A bridge puzzle requires crossing each edge once. A connected graph permits this only with how many odd-degree vertices?
Exactly one
Exactly three
Any odd number
Zero or two