Can you start the fire using two pieces of wood?

What does the below rebus riddle means?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

In the picture given below, can you find out which digit will take place of the question mark?

Count the number of triangles in the picture below:

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Decode this picture on T-Shirt and tell what it says ?

Find out which of the given views in the picture is accurately the top view of the given pyramid.