How can you tell a raw egg from a hard-boiled egg?

Forwards I am heavy, backward I am not. What am I?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

what does the below rebus mean?

When is the top of a mountain similar to a savings account?

What is the centre of gravity?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

How can you leave a room with two legs and return with six legs?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?