Can it be possible to build a house that has all its four walls facing towards the South?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

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.

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?

Which country gets ill every time?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

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