Replace the question mark with the number below given a simple math problem.

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.

I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you count the number of quadrilaterals in the picture below?

What does below rebus means ?

Move three sticks of the spiral below to form a square.

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

Can you find out who is the kidnapper in below Picture and why, Explain ?

How many triangles can you find in this given picture?

Spot what is wrong here in below Picture?