Weekly Puzzle

First | Previous | Next | Current | All

Puzzle No. 23

Posted on 03 June 2016

There are eight identical-looking coins. Six of them are genuine ones weighing 10 grams each; but the remaining two are fake and weigh 12 grams each. Using just a pan balance, what is the minimum number of trials needed to determine both the fake coins?

Your answer:

Click to show/hide hint

Click to show/hide explanation