How do you go from 98 to 720 using just one letter?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Can you find out the missing number in the grid?

What has lots of eyes, but can’t see?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Count the number of squares in the picture below.

Can anyone tell me a word in the English dictionary which has a silent 'z'?

What is so fragile that saying its name breaks it?

There is an ancient kingdom where every married woman keeps information regarding the fidelity of other men. However, what they don't know is the fidelity of their own husbands. Also, there is an ancient belief that they don't tell each other about the fidelity of their husbands.

On a certain day, the queen of the kingdom declares that she has identified at least one unfaithful man in the kingdom. She allows the wives to identify and gives them authority to kill their husbands if they are unfaithful at midnight.

How will the wives manage it?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?