Andrew has a chart containing the numbers 1 through 100. He is going to put an "X" on all of the multiples of 10 and a circle around all of the multiples of 4. How many numbers will have an "X", but will not be circled?
Olivia has a chart containing the numbers 1 through 100. She is going to put a circle around all of the multiples of 5 and a square around all of the multiples of 8. How many numbers will have both a circle and a square around them?