What has no start, end, or centre?

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?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

There is a place where if I stand up straight, I will still be considered sideways.

Which word does the below Plexor means ?

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

Which is Odd One Out and why?

4377

3954

9862

8454

9831

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

In a Society, there are over 100 flats.

Flat 1 is named the first flat.
Flat 2 is named the second flat.
Flat 3 is named the third flat. And So On.....

A visitor decides to walk through all the flats, and he finds all the flats except flat 62.
Anmol later founds that the locals of the town have given it another name.

What is the name of the Flat?