Join Mrs. McCartney for a Mystery Math Mistake, then learn to combine coins in different w Join Mrs. McCartney for a Mystery Math Mistake - T-Pops needs your help! We'll learn about coins and their ...

Thirty €1 coins are arranged in a circle on a table. Ten of these coins are fake and a little lighter than the 20 real coins. You don’t know where in the circle the fake coins are, but you have been ...