I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

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

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Count the number of lines in the image below ?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?