Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

What is the centre of gravity?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

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.

My location can be determined by the below rebus.
So where am i ?

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

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Can you find the six hidden animals in the picture below?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C