[Question]Natalia is riding a bicycle for the cycling competition. On Monday she rode 40 kilometers and on Tuesday 50 kilometers. On Wednesday she rode 50% fewer kilometers than the day before. On Thursday she rode as many as the sum of the kilometers from Monday and Wednesday. How many kilometers did Natalie ride in total?
[Answer]On Wednesday she covered half of the distance from Tuesday, so 50 / 2 = 25 kilometers. On Thursday she rode 40 + 25 = 65 kilometers. In total, Natalia rode 40 + 50 + 25 + 65 = 180 kilometers. The answer is 180.

[Question]4 students participated in a 200m race. If the average completion time of the last three students was 35 seconds, and the average completion time of all four runners was 30 seconds, how long (in seconds) did it take the student who came first to finish the race?
[Answer]The last 3 students had an average completion time of 35 seconds so the sum of their completion times was 3 * 35 = 105 seconds. All 4 students (now including the student who came first) had an average completion time of 30 seconds, meaning the sum of their completion times is 4 * 30 = 120 seconds. The student who came first spent 120 - 105 = 15 seconds in the race. The answer is 15.

[Question]Twenty people pre-bought plane tickets at a price of $155 per ticket. Thirty people bought their plane tickets at the gate and they each paid $200 for their ticket. How many more dollars did the people at the gate pay for their tickets than those passengers that pre-bought their tickets?
[Answer]Pre - bought: 20 people * $155 = $3100. Gate bought: 30 people * $200 = $6000. $6000 - $3100 = $2900. The passengers that paid at the gate paid $2900 more dollars than those who pre - bought their tickets. The answer is 2900.

[Question]Grandma Molly created statues of turtles for her front lawn. The first year, she created 4 statues and placed them on her lawn. The second year, she quadrupled the number of statues on her front lawn. In the third year, she added another 12 statues to the front lawn, but a hail storm broke 3 of the statues, which she threw away. In the fourth year, she added twice as many new statues as had been broken the year before. At the end of the four years, how many turtle statues were on her front lawn?
[Answer]
The second year, she quadrupled the number of statues in her front lawn, adding to the original 4 and bringing the total number to 4 * 4 = 16 statues. In the third year, she added another 12 statues, bringing the total number to 16 + 12 = 28 statues. But a hail storm broke 3, reducing the number to 28 - 3 = 25 statues. In the fourth year, she added twice as many new statues as had been broken the year before, adding 2 * 3 = 6 statues. Thus, the addition of these 6 statues brought the total number of statues to 25 + 6 = 31 statues. The answer is 31.