Amanda's young son, Ben loves to play the Piano and is very good at it. Yet he has neglected the other subjects in his class. Amanda arranged a teacher to give lessons to Ben in his weaker subjects.
Ben cannot add simple figures or subtract them.

Once the tuitor stretched his both hands and showed the ten fingers and bend three in one and asked if three fingers taken away as shown what happens?

Ben replied, "Then I will not be able to play the Piano!"