What's the only room from which no one can enter or leave

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

What work can one never finish?

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

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

Find the next number in the sequence

1, 2, 6, 21, 88, __?

When can we add 2 to 11 and get 1 as the correct answer?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?