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?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Which is the smallest number that you can write using all the vowels exactly once?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

What is the word or phrase below?
R | E | A | D

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?