It was a fine day in a nursery. Mrs Rina(teacher) decide to ask her student a simple question.

Teacher : Ok, today I will ask some of you a mathematical questions. Hmmm... David, currently you had RM1 in your pocket. If your dad give you another RM1, how much do your have?

David : RM1.

Teacher (shocked): No its wrong, David. If you already had RM1 and daddy give another RM1 it become RM2.

David : No, its RM1.

Teacher : How could it be?

David : Teacher won't know my dad...he will never give me another RM1...

Teacher was speechless..