Ms. Mitsuko told the class that if the average score on their quiz is higher than 75% then they will get a pizza party. There are 25 students in the class. One student is absent and has to take the test the next day. The average score of the students who took the test was 77%. What is the lowest grade the absent student can get for the class to still get a pizza party? Give the rationale and then the answer.
Let's think step by step. The total percentage the class needs to get is 18.75 because 25 x .75 = 18.75. The total percentage the class has absent the one student is 18.48. The lowest the absent student can get and still have a pizza party is 27% because (18.75 - 18.48)x 100 = 27.. The answer is: 27.

Evan's dog weighs 63 pounds; it weighs 7 times as much as Ivan's dog. Together, what is the weight of the dogs? Give the rationale and then the answer.
Let's think step by step. Ivan's dog weighs 63 / 7 = 9 pounds. Thus, the two dogs weigh 63 + 9 = 72 pounds.. The answer is: 72.

Ian won $100 in the lottery. He decided to use the money to pay off debts. He paid $20 to Colin. He then paid twice as much to Helen, as he had paid to Colin. Then finally, he paid half as much to Benedict, as he had paid to Helen. How much money, in dollars, does he have left after paying off debts? Give the rationale and then the answer.
Let's think step by step. Starting with $100, he paid $20 to Colin, leaving him with $100 - $20 = $80. Twice as much as $20 is 2 * $20 = $40. Thus, he paid $40 to Helen, leaving him with $80 - $40 = $40. Half as much to Benedict as he had paid to Helen is $40 / 2 = $20. Thus, he paid $20 to Benedict, leaving him with $40 - $20 = $20 after paying off all debts.. The answer is: 20.