You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What has a ring but no finger?

Why is 6 afraid of 7?

What has lots of eyes, but can’t see?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

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?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?