Replace the question mark with the correct number.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What has many keys but can’t open a single lock?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Which is the rope you never skip with?

If an electric train is travelling south, then which way is the smoke going?

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Find the missing number in the sequence below:

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?