nine nickles

Two times. Here's how to do it.

First, you separate them into 3 piles of 3 nickels and weigh any two piles. If one of the weighed piles is heavier than the other, the counterfeit is in that pile, if they balance, then your nickel is in the remaining pile. Next you pick two coins from the pile you have identified as the one containing the counterfeit and weigh them. If one is heavier you have your culprit, if they balance the remaining coin from the pile is the counterfeit.

The process I woud take is to go on about my business.
I do not accept nickels nor pennies.





David

Once, put them all on and take them off one by one. PS: I found that answer from a similar question. I'm not that smart.

two times