We have a question: Raine's house is just a walking distance from her school. It takes her 150 steps to walk to the school. How many steps does she take walking to and from school in five days?
And an answer: 1500
So how you got the answer?
Raine takes 150 x 2 = 300 steps walking to and from school each day. Thus, it takes her 300 x 5 = 1500 steps in five days.

We have a question: For Roger's phone to function optimally, he can have a maximum of 50 apps on his phone. However, the recommended number of apps is 35. If Roger has twice the recommended number of apps, how many apps must he delete for his phone to function optimally again?
And an answer: 20
So how you got the answer?
Roger has 35 x 2 = 70 apps on his phone. He needs to delete 70 - 50 = 20 apps.

We have a question: Sam invested $10,000 and earned 20% interest compounded for 3 years. He then invested more until he had three times as much invested. The next year, he got a 15% return on his investment. How much money does he have now?
And an answer: 59616
So how you got the answer?
After one year, Sam had $10,000 * 1.2 = $12,000. After two years, he had $12,000 * 1.2 = $14,400. After the third year, he had $14,400 * 1.2 = $17,280. He then invested more money until he had 3 * $17,280 = $51,840. The first year after that, he had $51,840 * 1.15 = $59,616.