We have a question: Genevieve picked some cherries from the supermarket shelves that cost $8 per kilogram. When Genevieve reached the checkout counter, she realized she was $400 short of the total price and her friend Clarice chipped in. If Genevieve had $1600 on her, how many kilograms of cherries did she buy?
And an answer: 250
So how you got the answer?
If Genevieve had $1600 on her, and Clarice chipped in with $400, the total cost of the cherries was $1600 + $400 = $2000. If the cherries cost $8 per kilogram, Genevieve bought $2000 / $8 = 250 kilograms of cherry.

We have a question: Yesterday, Vincent bought fifteen packs of stickers. Today, he bought ten more packs of stickers than yesterday. How many packs of stickers does Vincent have altogether?
And an answer: 40
So how you got the answer?
Today, Vincent bought 15 + 10 = 25 packs of stickers. Therefore, Vincent has 15 + 25 = 40 packs of stickers.

We have a question: John pays for half the cost of raising a child. It cost $10,000 a year for the first 8 years and then twice that much per year until the child is 18. University tuition then costs $250,000. How much did it cost?
And an answer: 265000
So how you got the answer?
The first 8 years cost 8 * 10,000 = $80,000. The next 18 - 8 = 10 years. They cost 10000 * 2 = $20,000 per year. So they cost 20,000 * 10 = $200,000. So the cost was 200,000 + 80,000 = $280,000. Adding in the cost of tuition brings the cost to 250,000 + 280,000 = $530,000. Since John pays for half the cost of raising the child, he pays $530000 / 2 = 265000.