Gina had $400. She gave 1/4 of her money to her mom, used 1/8 of her money to buy clothes, gave 1/5 of her money to a charity, and kept the remaining money. How much did Gina keep? Give the rationale and then the answer.
Let's think step by step. Gina's mom received 1 / 4 x $400 = $100. She used 1 / 8 x $400 = $50 to buy clothes. She gave 1 / 5 x $400 = $80 to a charity. Thus, she spent a total of $100 + $50 + $80 = $230. Therefore, Gina kept $400 - $230 = $170.. The answer is: 170.

Toby is in a juggling contest with a friend. The winner is whoever gets the most objects rotated around in 4 minutes. Toby has 5 baseballs and each one makes 80 rotations. His friend has 4 apples and each one makes 101 rotations. How many total rotations of objects are made by the winner? Give the rationale and then the answer.
Let's think step by step. Toby gets 400 full rotations because 5 x 80 = 400. His friend get 404 rotations because 4 x 101 = 404. The winner rotated 404 objects because 404 > 400.. The answer is: 404.

Cilia wants to buy a multi-level dumbbell system. The first pair of dumbbells are 3 lb weights, the second pair is 5 lb weights and the third is 8 lb pounds. How much does the entire system weigh? Give the rationale and then the answer.
Let's think step by step. The first pair of weights weighs 3 lb each so all total they weigh 2 * 3 = 6 lbs. The second pair of weights weigh 5 lbs each so they weigh 2 * 5 = 10 lbs. The third pair of weights weigh 8 lbs each so they weigh 2 * 8 = 16lbs. All total, the entire system of weights weigh 6 + 10 + 16 = 32 lbs.. The answer is: 32.