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

What demands an answer, but asks no questions

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Solve this riddle by finding the odd one out from the rest.

If you say my name, I will no longer exist. What am I?

With the help clues provided in the image, can you find the 5 digit key?

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

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

Which word does the below Plexor means ?