Reasoning and answer: 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
What was the question?
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?


The burger meal is $6.00 and to upsize the meal is $1.00 so 6 + 1 = $7.00. He spends $7.00 on lunch and after 5 days he spends 7 * 5 = $35.00.
The answer: 35
Reverse engineering the question: Clinton buys a burger meal for lunch for $6.00 and up sizes his fries and drinks for $1.00 more.  If Clinton buys this same meal every day for 5 days, how much does he spend on lunch?


Reasoning and answer: He has 60 - 20 = 40 kilograms of mangoes left after selling them to the market. Colby sold 1 / 2 x 40 = 20 kilograms of mangoes to the community. Therefore, Colby still has 20x8 = 160 pieces of mangoes.
The answer: 160
What was the question?
Question: Colby harvested his mango trees, the total mangoes he harvested is 60 kilograms. He sold 20 kilograms to the market and sold the remaining half to his community. If each kilogram contains 8 mangoes, how many mangoes does he still have?


Jan was 2 years older than Cindy who was 5 so 2 + 5 = 7 years old. Marica was twice as old as Jan so 2 * 7 = 14 years old. Greg was 2 years older than Marcia who was 14 so 2 + 14 = 16 years old.
The answer: 16
Reverse engineering the question: Cindy was 5 years old. Her sister Jan was 2 years older than Cindy. Their oldest sister Marcia was twice as old as Jan. Greg was two years older than Marcia. How old was Greg?


Reasoning and answer: The bag full of sand would weigh 250 * .8 = 200 pounds. The filling material would make it 200 * .4 = 80 pounds heavier. So it weighs 200 + 80 = 280 pounds.
The answer: 280
What was the question?
Question: Tom fills a 250 pound sandbag 80% full. But the filling material he is using is 40% heavier than sand. How much does the bag weigh?


Reasoning and answer: Half of 32 tables is 32 * (1 / 2) = 16 tables. 16 tables have 2 chairs each for a total of 16 * 2 = 32 chairs. 5 tables have 3 chairs each for a total of 5 * 3 = 15 chairs. There are 32 - (16 + 5) = 11 tables left. 11 tables have 4 chairs each for a total of 11 * 4 = 44 chairs. The total number of chairs is 32 + 15 + 44 = 91 chairs.
The answer: 91
What was the question?
Question:
There are 32 tables in a hall. Half the tables have 2 chairs each, 5 have 3 chairs each and the rest have 4 chairs each. How many chairs in total are in the hall?