What do you think?

Chancie · 10-17-2010, 11:08 AM

There are a few different ways to start this problem.

My students agreed that

They would divide the coins in four piles with 25 coins each, and

I labeled them A, B, C, and D.

First we compared A and B, and either

They balanced the scale, which meant that they were all valuable coins or

They were different, which meant that all the coins in C and D were genuine.

10-17-2010, 11:08 AM	#17
Chancie Senior Member How Do You Identify?: queer femme-inist Relationship Status: I'm lucky. Join Date: May 2010 Location: Western Mass Posts: 3,774 My Photo Gallery Thanks: 9,518 Thanked 14,540 Times in 2,744 Posts Rep Power: 21474855	There are a few different ways to start this problem. My students agreed that They would divide the coins in four piles with 25 coins each, and I labeled them A, B, C, and D. First we compared A and B, and either They balanced the scale, which meant that they were all valuable coins or They were different, which meant that all the coins in C and D were genuine.