Gabrielle saw 5 + 4 + 3 = 12 birds. Chase saw 2 + 3 + 5 = 10 birds. So, Gabrielle saw 12 - 10 = 2 more birds than Chase. Therefore, Gabrielle saw 2 / 10 x 100% = 20% more birds than Chase.
The answer: 20
Reverse engineering the question: While bird watching, Gabrielle saw 5 robins, 4 cardinals, and 3 blue jays. Chase saw 2 robins, 3 blue jays, and 5 cardinals. How many more birds, in percentage, did Gabrielle saw than Chase?

Alex traveled at 20 miles per hour for 4.5 hours, so 20 * 4.5 = 90 miles on flat ground. He traveled 12 miles per hour uphill for 2.5 hours, so 12 * 2.5 = 30 miles uphill. He traveled downhill 24 miles per hour for 1.5 hours = 24 * 1.5 = 36 miles downhill. Before his tire punctured, he traveled 90 + 30 + 36 = 156 miles. So as the next town is 164 miles from where he began, Alex had to walk for 164 - 156 = 8 miles.
The answer: 8
Reverse engineering the question: Alex is on a cross-country bike trip. After starting this morning, he manages an average speed over flat ground of about 20 miles per hour. Four and a half hours later, the road started to incline upwards enough that he could only manage 12 miles per hour. Two and a half hours later, though, the road declined downhill and was able to mostly coast at 24 miles per hour. Unfortunately, he only got to enjoy this for one and a half hours before he punctured a tire. He had forgotten to pack a repair kit, so he had to walk his bike the rest of the way to the next town. If the next town was 164 miles from where he started this morning, how far did Alex have to walk?

Peter needs $5,000 – $2,900 = $2,100 in total. He will have to wait for $2100 ÷ $700 / month = 3 months to reach his goal.
The answer: 3
Reverse engineering the question: Peter has a plan to take his family on a vacation to Germany. He needs $5,000 to cover all the spending for the travel, and he has $2,900 in savings right now. If he can save up $700 each month, how many months does he need to wait to reach his goal?

There are a total of 5 vans x 28 students = 140 students. If 60 are boys, then 140 - 60 = 80 of these students are girls.
The answer: 80
Reverse engineering the question:
Five coaster vans are used to transport students for their field trip. Each van carries 28 students, 60 of which are boys. How many are girls?