We have a question: Erika and her 3 siblings are drawing with chalk outside. Another 3 friends join them and ask if they can help with the drawing. Erika loses 2 pieces of chalk as they are counting and the group realizes there isn't enough chalk for everyone. Erika's mom brings out another 12 pieces of chalk for them to share and there is now enough chalk for everyone to have 3 pieces each. How many pieces of chalk did Erika and her siblings originally have?
And an answer: 11
So how you got the answer?
Altogether, there are 1 Erika + 3 siblings + 3 friends = 7 people drawing outside. The group has a total of 7 people * 3 pieces of chalk each = 21 pieces of chalk altogether. Before Erika's mom helped, they had 21 total pieces of chalk - 12 pieces of chalk Erika's mom brought = 9 pieces of chalk. Then adding the chalk that Erika lost shows that the group originally had 9 pieces of chalk + 2 lost pieces of chalk = 11 pieces of chalk.

We have a question: Victoria had $500. She went to the market and bought 2 packets of rice each at $20, 3 packets of wheat flour each at $25, and 1 soda at $150. What was her remaining balance?
And an answer: 235
So how you got the answer?
In total, she spent 2 * $20 + 3 * $25 + $150 = $265. Thus her remaining balance is $500 - $265 = $235.

We have a question: John buys 1/2 gallon jugs of cold brew coffee every 4 days. How many cups of coffee does he drink a day?
And an answer: 2
So how you got the answer?
He drinks 128 / 2 = 64 ounces of coffee every 4 days. That means he drinks 64 / 4 = 16 ounces of coffee a day. So he drinks 16 / 8 = 2 cups a day.