[Question]: Eliana walked 200 steps for her morning exercise, did some press-ups, then added some 300 more steps to her count for the first day. The next day, she walked twice the number of steps she walked on the first day. And on the third day, Eliana walked an additional 100 steps. What's the total number of steps Eliana walked during these three days?
[Answer]: On the first day, she walks 200 + 300 = 500 steps. The next day she walks twice the steps, which is 2 * 500 = 1000. The total number of steps after the two days are 1000 + 500 = 1500. On the third day, she walks an additional 100 steps, bringing the three - day total to 1500 + 100 = 1600 steps.
So the answer is 1600.

[Question]: There are 30 students in Ms. Leech's class. Twice as many girls as boys are in the class. There are 10 boys in the class and each boy today brought 5 cups for science activity class as Ms. Leech had instructed. If the total number of cups brought by the students in the class is 90, how many cups did each girl bring?
[Answer]: If there are 30 students in Ms. Leech's class, and the number of boys is 10, the number of girls in Ms. Leech class is 30 - 10 = 20. If each boy brought 5 cups for the science activity, the total number of cups brought by the boys is 5 * 10 = 50 cups. The number of cups that the girls brought is 90 - 50 = 40 of the total number. Since the number of girls in the class is 20, each girl brought 40 / 20 = 2 cups each.
So the answer is 2.

[Question]: Three adults whose average weight is 140 pounds went first in the elevator. Two children whose average weight is 64 pounds also went inside. If an elevator sign reads "Maximum weight 600 pounds.", what is the maximum weight of the next person to get in the elevator so that it will not be overloaded?
[Answer]:
The sum of the weights of the three adults is 140 x 3 = 420 pounds. The sum of the weight of the two children is 64 x 2 = 128 pounds. So the total weight of the 5 people who are in the elevator is 420 + 128 = 548 pounds. This would mean that the next person's weight must not exceed 600 - 548 = 52 pounds.
So the answer is 52.