Upside Down

Amy is a bright kid. She recently learnt the numbers from 0 to 9, and spends all her time these days, trying to write larger numbers. One day she wrote a number on a paper, and turned it upside down. It surprised and amazed her that the writing on the paper still made sense. So, now she has created a game for herself, where she writes numbers and looks at them upside down to see if it still is va