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 sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

Why are televisions attracted to people?

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

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

Can you count the number of squares in the figure below?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?