Why Aeroplane windows are round?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

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?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

What does this below rebus puzzle mean?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

I taste better than I can smell. Who am I?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?