Can you find out who is the kidnapper in below Picture and why, Explain ?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

What demands an answer, but asks no questions

Can you arrange the six given marbles in a manner that each one of them is touching all four marbles of different colours?