A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

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

What kind of tree can you carry in your hand?

I have branches, but no fruit, trunk or leaves. What am I?

How can one talk without saying a single word?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Why Aeroplane windows are round?

What is more useful when it is broken?