a deck of 100100 cards is numbered from 11 to 100100. each card has the same number printed on both sides. one side of each card is red and the other side is yellow. barsby places all the cards, red side up, on a table. he first turns over every card that has a number divisible by 22. he then examines all the cards, and turns over every card that has a number divisible by 33. how many cards have the red side up when barsby is finished?
