A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

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

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What two things can you never eat for breakfast?

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

Can you count the number of triangles in the given picture?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?