If eleven plus two equals one, what does nine plus five equal?

What does the below mathematical rebus mean?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

I have no life, but I can die. What am I?

What has lots of eyes, but can’t see?

Count the number of triangles in the picture below:

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

You are on your way to visit your Friend, who lives at the end of the hill. It is his birthday, and you want to give him the cakes you have made. Between your house and his house, you have to cross 5 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake. How many cakes do you have to leave home to make sure that you arrive at a friend's house with exactly two