Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

I don't get anymore wetter, no matter how much rain falls on me.

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

I shave every day, but my beard stays the same. What am I?

A pet show was happening in my locality. I went down along with my kids. In that show, I noticed that all except two of the entries were cats. All except two were dogs and all except two were Monkeys.

Can you find out how many of each animals were present in that pet show?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

In the formation, you can see a few arranged matchsticks. Can you form three squares by moving just three matchsticks?