By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Through your logical capabilities, can you make 7 an even?

What is the end of everything?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?