What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

How can one talk without saying a single word?

People make me, save me, change me, raise me. What am I?

I can write cow in 13 letters.

Can You?

A landlord calls both of his sons and tells them that their horses will now decide who will transfer the inheritance. He tells them to race along the land till the end and the one whose horse will be slower will win and be the heir to all the property.

Both of them keep wandering for days but to no result. Then they ask a wise man regarding it. The man advises them on the matter after which they jump on the horses and race as fast as they can till the end. Why did they do it?

What did the wise man say?