[Question]Jake trips over his dog 40% percent of mornings. 25% of the time he trips, he drops his coffee. What percentage of mornings does he NOT drop his coffee?
[Answer]First multiply the chance of each event happening to find the chance they both happen: 40% * 25% = 10%. Then subtract that percentage from 100% to find the percentage of the time Jake doesn't drop his coffee: 100% - 10% = 90%. The answer is 90.

[Question]In a math contest, Riley and Ofelia are on one team. The team's final score is obtained by adding the scores of the students of the same team. Out of the 35 questions, Riley got 3 mistakes while Ofelia got 5 more than half the score of Riley. How many incorrect answers did their team get?
[Answer]Riley's score is 35 - 3 = 32. Half of Riley's score is 32 / 2 = 16. So Ofelia's score is 16 + 5 = 21. Hence, Ofelia got 35 - 21 = 14 incorrect answers. Therefore, their team got 3 + 14 = 17 incorrect answers. The answer is 17.

[Question]Rosalina receives gifts from three people on her wedding day. How many gifts did she get if Emilio gave 11 gifts, Jorge gave 6 gifts, and Pedro gave 4 gifts?
[Answer]If Emilio presents 11 gifts and Jorge 6 gifts, together they have presented 11 + 6 = 17 gifts. If Pedro also gives Rosalinda 4 gifts, Rosalinda's total number is 17 + 4 = 21 gifts. The answer is 21.

[Question]The school is hosting a race after school. The winner is the person who runs the most laps around the school in 12 minutes. One lap around the school is 100 meters. The winner is awarded a gift certificate equal to $3.5 for every one hundred meters they run. The winner runs 24 laps around the school. On average, how much did they earn per minute?
[Answer]
They ran 2,400 meters because 24 laps x 100 m / lap = 2400 m. They ran 200 meters per minute because 2400 m / 12 min = 200 m / min. For every minute they ran they earned an average of $7 because $3.5 / 100m x 200 m / min = $7 / min. The answer is 7.