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

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Can you find the next number in the sequence?

113 119 101 114 116 ?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Can you tell a 3D object that has just two surfaces?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

When it is alive we sing, when it is dead we clap our hands. What is it?

Spot the cat in the picture below