We have a question: Jay has decided to save money from his paycheck every week. He has decided that he will increase the amount he saves each week by 10 dollars. If he started by saving 20 dollars this week, how much will he have saved in a month from now?
And an answer: 60
So how you got the answer?
In one week he will have saved 20 + 10 = 30 dollars. In two weeks he will have saved 30 + 10 = 40 dollars. In three weeks he will have saved 40 + 10 = 50 dollars. At the end of week four, he will have saved 50 + 10 = 60 dollars.

We have a question: Dan spent an hour doing 400 work tasks at $0.25 each. Then Dan spent an hour doing 5 work tasks at $2.00 each. How much more did Dan make doing the good work compared to the lower-paid work?
And an answer: 90
So how you got the answer?
Dan spent an hour doing 400 tasks * $.25 = $100. Dan spent an hour doing 5 tasks * $2.00 each = $10.00. Dan made $100 - $10 = $90.00 per hour more doing the higher paid work.

We have a question: Bob and Jim decide to skip rocks. Bob can skip a rock 12 times. Jim can skip a rock 15 times. If they each skipped 10 rocks how many total skips did they get?
And an answer: 270
So how you got the answer?
Bob got 12 * 10 = 120 skips. Jim got 15 * 10 = 150 skips. So in total they got 120 + 150 = 270 skips.