In which direction should the missing arrow point?

Why Aeroplane windows are round?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

How can you make number one disappear by adding something to it?

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

What demands an answer, but asks no questions

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?