top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration Why to Join

    Get Free Puzzle Updates

Facebook Login
Site Registration

You have 2 balls with identical diameter and weight. One is solid, one is hollow. How can you find the solid one?

0 votes

You have 2 balls with identical diameter and weight. One is solid, one is hollow. You can't tell by knocking on them. How can you find the solid one?

posted Apr 24, 2017 by anonymous

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

Drop it in water, which floats, is the hollow one.

answer Apr 26, 2017 by anonymous
If both are of same weight and diameter then either both will float or both will not float.
Same diameter means same volume.
It doesn't say that material is same. So the weight can be same for same diameter.

Similar Puzzles
0 votes

There is an island with 12 islanders. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11.

You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. There are no scales or other weighing device on the island.

How can you find out which islander is the one that has a different weight?

+1 vote

There are 10 identical boxes each containing 10 balls. One Of the box has all the balls of 9 kgs while rest of the boxes have balls of 10 kgs. You have an electronic weighing machine. How could you find the box with 9 kgs balls with just 1 weighing?

+1 vote

In the drawer beside your bed, you have three orange, two pink and five purple balls. There is no electricity and the room is completely dark.
How many balls you must take out to make sure you have one ball of each color at least.

Contact Us
+91 9880187415
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Karnataka INDIA.