A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

What runs around the whole yard without moving?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

How many Watermelons are there in the below picture?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?