What seven-letter word has hundreds of letters in it?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

Which is faster, Heat or Cold ? Explain.

Which Travels Faster? Solve below famous picture riddle:

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?