What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

You can hear me, but you can't touch or see me.

What am I?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Which is heavier: a ton of bricks or a ton of feathers?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.