There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

If two's company, and three's a crowd, then whats four and five ?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What is red and smells like blue paint?

Count the number of triangles in the given picture.

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

How do you go from 98 to 720 using just one letter?

What country can make you shiver?