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

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

There are forty elephants and they have forty-fore heads. How can this be possible?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Who has married many women but was never married?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?