Math Riddles

These Math Riddles are based on math concepts and can be solved with a bit of math and logic. These fun riddles can surely give you a tough time.

Delivering Grain on Time

A collective farm was due to deliver its quota of grain to the state authorities. The management of the Kolkhoz decided the trucks should arrive in the city at exactly 11:00 A.M.

If the trucks traveled at 30 miles per hour they would reach the city at ten, an hour early; at 20 miles an hour they would arrive at noon, an hour late.

How far is the Kolkhoz from the city, and how fast should the trucks travel to arrive at 11:00 A.M.?

Riddle Answer

The Two Trains Puzzle

Two trains start at the same time, one from London to Liverpool, the other from Liverpool to London. If they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

Riddle Answer

The Bobber

You can paddle your canoe seven miles per hour through any placid lake. The stream flows at three miles per hour. The moment you start to paddle up stream a fisherman loses one of his bobbers in the water fourteen miles up stream of you.

How many hours does it take for you and the bobber to meet?

Riddle Answer

Russian Gangster

A Russian gangster kidnaps you. He puts two bullets in consecutive order in an empty six-round revolver, spins it, points it at your head and shoots.

*Click* You’re still alive!

He then asks you, “Do you want me to spin it again and fire or pull the trigger again right away?” Which option will give you a higher probability of not being shot at?

Riddle Answer