You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

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?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Name a key which is hardest to turn.

How can one talk without saying a single word?

If your uncle’s sister is not your aunt, what relation is she to you?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Can you count the number of triangles in the given figure?