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 = ?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Can you name some countries which do not have the alphabet 'A' in them?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

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

You walk into an old horror house. It has no power or plumbing. Once inside, you see three doors. Each door has a number on it. Behind each door is a way for you to die. Behind door number one, you die by getting eaten by a lion. Behind door number two, you die by getting murdered. Behind door number three, you die by an electric chair. You can’t turn back, so you have to go through a door. Which door do you go through?