Which is heavier: a ton of bricks or a ton of feathers?

Can you find out the total number of triangles in the given figure?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Using Only Five 5's and any mathematical operator make sum as 37

Can you find the missing piece of the Porsche?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

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

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.