What happened when the wheel was invented?

What do you call a fish without an eye?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

I look at you, you look at me I raise my right, you raise your left. What am I?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

What has a bottom at the top?

What number divided by 4 is the same as that number minus 4?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.