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

What is next number in the pattern below:

131 517 192 123 ?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Find the number of squares in the below-given picture.

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?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

What is so fragile that saying its name breaks it?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

What is black when you buy it, red when you use it, and gray when you throw it away?

What word does this rebus represent?

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