I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

What brings you down but never up?

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

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

What is the largest number you can write with just 3 digits?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?

Find the last number in the series below:

voN luJ yaM raM ---

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