Critical Thinking Puzzles

Julia is as old as John will be when Julia is twice as old as John was when Julia's age was half the sum of their present ages. Joh...

There are 10 barrels of gold coins. In that, some of the barrels contain 1 gram gold coins and some of the barrels contain 2 gram gold coi...

if 5+3=28, 9+1=810, 8+6=214, 5+4=19 then 7+2= ??

You are making an opaque cube (ie you cannot see through its sides). It can be any size that you want it to be. Where do you place the c...

Three boxes are all labeled incorrectly, and you must get the labels right. The labels on the boxes read as given below. To gain the inf...

This is a story about three people (A, B and C) crossing a desert. A hated C and decided to kill him - he poisoned the water in his sack...

A 120 wire cable has been laid firmly underground between two telephone exchanges located 10km apart. Unfortunately after the cabl...