I can't get the point.

[victor su]

I can't get the point of this this conversation. Can you help me.

A: Remember the teacher?

B: Age thirty –two?

A : Age twenty –nine.
B: Reduced from thirty –two?

A: A mistake.

[Anglika]

A: Remember the teacher?
B: Age thirty –two?

A : Age twenty –nine.
B: Reduced from thirty –two?
A: A mistake.

A joke - The teacher is probably 32 years old, but is trying to persuade people that he/she is twenty nine.