[Question]Cara has 60 marbles in a bag. 20 of them are yellow, half as many are green, and the remaining marbles are equally divided between red and blue. If Cara picks a marble at random, what are the odds it's blue (expressed as a percentage)?
[Answer]First find the number of green marbles: 20 yellow marbles / 2 = 10 green marbles. Then find how many marbles are either red or blue: 60 marbles - 20 yellow marbles - 10 green marbles = 30 marbles. Divide this number in half to find how many marbles are blue: 30 marbles / 2 = 15 blue marbles. Finally, divide the number of blue marbles by the total number of marbles and multiply by 100 to find the percentage chance of getting a blue marble: 15 marbles / 60 marbles * 100 = 25%. The answer is 25.

[Question]Frank has three less than half the number of cookies as Mike. Mike has three times as many cookies as Millie. If Millie has 4 cookies, how many cookies does Frank have?
[Answer]Mike has 4 * 3 = 12 cookies. Frank has 12 / 2 - 3 = 3 cookies. The answer is 3.

[Question]Mike is shopping at the mall. He needs to buy a shirt, a new wallet, and some food for the evening. The shirt costs a third of the value of the wallet. The wallet is $60 more than the cost of the food, on which Mike spent $30. How much did Mike spend that day on the shopping?
[Answer]The wallet costs $60 more than the food, so it's $30 + $60 = $90. So the cost of the shirt is 1 / 3 * $90 = $30. Mike spent that day $30 + $30 + $90 = $150. The answer is 150.

[Question]The new pad of paper has 120 pages. Sammy uses 25% of the pages for his science project, and another 10 pages for his math homework. How many pages remain in the pad?
[Answer]
He used 0.25 * 120 = 30 on science. There were 120 - 30 = 90 pages left. And then he has 90 - 10 = 80 after math. The answer is 80.