Why Aeroplane windows are round?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

The Little ant seems to be always confused. Do you know why?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

A family is trapped in a jungle. There is a bridge which can lead them to safety. But at one time, the bridge can only allow two people to pass through. Also, all of them are afraid of the dark and thus, they can't go alone.

Father takes 1 minute to cross, the mother takes 2 minutes, the son takes 4 and the daughter takes 5 minutes. While crossing the time taken will be according to the slower one. How can they all reach the other side in the minimum possible time?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What month of the year has 28 days?