The itsy bitsy spider wants to climb up the inside of a one foot water spout. The itsy bitsy spider can climb 3 3/4 inches each day before the rain comes down and washes her back 1 1/4 inches each night. The next day the sun comes up and dries up all the rain and the itsy bitsy spider begins climbing again. Despite her discouraging progress, the itsy bitsy spider continues with this frustrating cycle until she makes it up and out of the water spout. How many days does it take the itsy bitsy spider to get out of the water spout?
each day the spider gains 3 3/4 - 1 1/4 = 2 1/2 inches
4 * 2 1/2 = 10
On the 5th day he makes it out of the spout