skip to main content


Random Puzzles 


?

Puzzle 1 


Elevator MishapAll Logic Puzzles

Six people were in a room together, when suddenly the lights went out. When the lights came back on, Fred Albert's wallet was missing!

Detectives have investigated, they have questioned the suspects, the witnesses, and people who know the suspects. They have collected physical evidence (hair samples, fibre samples, etc.) from the crime scene. They have collected these clues, but have not been able to solve the crime.

They have now asked for your help. Examine the clues, and see if you can solve the crime.

The suspect who owns a purple car was wearing tan shoes.
The suspect who weighs 180 pounds owns a green car.
The suspect who owns a black car was wearing blue shoes.
The suspect who weighs 150 pounds was wearing tan shoes.
Brian Martin owns a green car.
Marty Jones was carrying a purple umbrella.
John Fox has red hair.
Larry Smith weighs 210 pounds.
The suspect who weighs 190 pounds was wearing blue shoes.
The suspect who was carrying a red umbrella is not the one who was wearing black shoes.
The thief owns a black car.
The suspect who owns a white car is not the one who weighs 170 pounds.
Bill Edison was wearing brown shoes.
The suspect who weighs 190 pounds is not the one who has red hair.
No two suspects have the same weight, colour shoes, colour umbrella, colour car, or hair colour.

Puzzle Copyright © David Leithauser

workings hint answer print

???

Puzzle 2 


In this puzzle, all of the numbers from 1 to 8 are used.

The differences (larger − smaller) between any two connected numbers are all different.

Can you complete the grid?

3 x 3 grid. A to I (H is blank). Connections: A-D, B-E, C-F, D-G, F-I, D-E, E-F. Values: A=7, E=1, I=5.

Note: this puzzle is not interactive, and cannot be clicked.

Puzzle Copyright © Kevin Stone

workings hint answer print

?

Puzzle 3 


Recently Kevin had a party and because it was his birthday he wanted a mathematical cake!

He ordered a cake in the shape of a cube and had it completely iced (but of course the shop didn't ice the underneath because that just isn't very sensible).

He cut every side of the cake into three equal pieces, giving 27 slices of cake.

He ended up eating all of the pieces of cake that had exactly 2 sides with icing.

So, how many pieces did that leave for the guests?

Puzzle Copyright © Kevin Stone

workings hint answer print

?

Puzzle 4 


What is missing in this sequence:

8 · 10 · 14 · 18 · ? · 34 · 50 · 66

workings hint answer print