Which vehicle is needed to make scale balance?
Here is solution:
Look at the picture and find how many Yellow Triangles will balance the last scale?
There are nine metal blocks.
1 metal block is slightly lighter than the other 8.
If you have a balance scale find the minimum times will you have to weigh to find the lighter block?
You are given eight coins and told that one of them is counterfeit. The counterfeit one is slightly heavier than the other seven. Otherwise, the coins look identical. Using a simple balance scale, how can you determine which coin is counterfeit using the scale only twice?
There are 9 similar balls. Eight of them weigh the same and the ninth is a bit heavier. How would you identify the heavier ball if you could use a two-pan balance scale only twice?
