Why Aeroplane windows are round?

What does this mean?

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I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Which five letter word can be added at the end of below word to form a
valid word?

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John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

In the Thar desert, 3 men found a big 24L Jar is full of water. Since there is a shortage of water so they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13L, a 5L and an 11-litre Jar.

How do they do it?

What does this rebus picture identify?

Can you find the company name in the pictogram below?

Can you count the number of squares in the figure below?

What number do you get when you multiply all of the numbers on a telephone's number pad?