The ratio between the time charged and the time to be charged is 100 / 25 = 4. To reach 100%, the cell must be charged for 45 minutes * 4 = 180 minutes. Subtracting the 45 minutes that Jimmy already used to charge the cell phone, there are still 180 - 45 = 135 minutes of charging time left.
The answer: 135
Reverse engineering the question: Nick's cell phone was initially empty but was then charged for 45 minutes and has reached a 25% charge. How much longer must the cell phone be charged to reach 100% charge?

Emily sold 180 / 3 = 60 oranges. Alice sold 60 * 2 = 120 oranges.
The answer: 120
Reverse engineering the question: Alice and Emily are selling oranges at the farmer's market. Alice sold twice as many oranges as Emily did. In total, they sold 180 oranges. How many oranges did Alice sell?

She has 5 grandchildren 4 children so she needs 5 + 4 = 9 stockings. The stockings are $20.00 each and currently 10% off so that's 20 * .10 = $2.00 off. The stockings are $20.00 with a $2.00 discount so they are each 20 - 2 = $18.00. The stockings are now $18.00 and she needs 9 so that's $162.00. She also wants to monogram each stocking at $5.00 per stocking so that's 9 * 5 = $45.00. The stockings are $162.00 and the monogramming will cost $45.00 so the stockings will cost 162 + 45 = $207.00.
The answer: 1035
Reverse engineering the question: Pearl wants to order 5 monogrammed Christmas stockings for each of her 5 grandchildren and her own 4 children. The stockings are $20.00 each and currently 10% off. The monogramming will costs $5.00 per stocking. How much will the stockings costs?

On weekdays he eats 5 * 2 = 10 chocolates. On weekends he eats 2 * 1 = 2 chocolates. He eats 10 + 2 = 12 chocolates in a week. It takes 24 / 12 = 2 weeks to finish all the chocolate.
The answer: 2
Reverse engineering the question:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Erwin eats 2 chocolates on weekdays and 1 chocolate on weekends. He ate 24 chocolates in total. How many weeks did it take to finish all the chocolate?