Mathematical Problems
So you did well at Maths in school? How do you go with these mathematical brain teasers?
Title  Detail  Hits  Rating 

Where is the father?  A mother is 21 years older than her child. In 6 years time, the mother will be 5 times ol... more>>>  
What is the sixth number?  It is said that designers take 10 seconds to resolve this, engineers take 3 minutes, architects 3... more>>>  
Triangles  Which triangle has a bigger area: A. A triangle with sides measuring 300, 400, and... more>>>  
The biggest area  A farmer challenges an engineer, a physicist, and a mathematician to fence off the largest amount... more>>>  
Solved by preschoolers in 5 mins  8809 = 6 7111 = 0 2172 = 0 6666 = 4 1111 = 0 3213 = 0... more>>>  
Socks in a drawer  There are 30 socks in a drawer. 60% of the socks are red and the rest are blue. What is the minim... more>>>  
Red and Blue Marbles  You have two jars, 50 red marbles and 50 blue marbles. A jar will be picke... more>>>  
Overlapping clock hands  How many times do the two hands on a clock overlap every day? ... more>>>  
Measuring water  ... more>>>  
How would you weigh an aeroplane  A common brain teaser used in some job interviews... how would you weigh an aeroplane without sca... more>>>  
