Can you name an animal whose killing cannot be performed without spilling your own blood?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Can you make a six-letter word using the letters N, A and B ?

Decode this picture on T-Shirt and tell what it says ?

What kind of band never plays music?

What do you get if you add 2 to 100 four times?

A bank customer had $100 in his account. He then made 6 withdrawals. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
$50 $50
$25 $25
$10 $15
$8 $7
$5 $2
$2 $0
----- -----
$100 $99

Why are the Totals not tallying?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

Which Travels Faster? Solve below famous picture riddle:

What can go up a chimney down, but can’t go down a chimney up?