Janice can type 6 sentences per minute. Today at work, Janice continued working on a paper she started typing yesterday. She typed for 20 minutes, took a break, and typed 15 minutes longer. She then had to erase 40 sentences she had typed incorrectly. After a meeting, she typed for 18 minutes more. In all, the paper had 536 sentences by the end of today. How many sentences did she start with today?
Let's think: Janice had X sentences from yesterday already typed to start with today. Janice typed 6 * 20 = 120 sentences before her break. She typed 6 * 15 = 90 sentences after her break. She typed 6 * 18 = 108 sentences after her meeting. Therefore, she typed 120 + 90 + 108 = 318 sentences today in all. She had to erase 40 sentences, so she had 318 - 40 = 278 sentences that she typed today left. The paper had X + 278 = 536 sentences at the end of today. Thus, she had X = 536 - 278 = 258 sentences typed on the paper to start with today.. The answer is: 258.

Jackson buys a computer game for $66 and three movie tickets for $12 each. How much did he spend on entertainment total?
Let's think: First find the total amount of money Jackson spent on movie tickets: 3 tickets * $12 / ticket = $36. Then add the amount he spent on the video game: $36 + $66 = $102.. The answer is: 102.

Ludwig works 7 days a week and he usually works half of the day during Friday, Saturday, and Sunday. If his daily salary is $10, how much does he earn every week?
Let's think: Ludwig earns a total of $10 x 4 = $40 from Monday to Thursday. He earns $10 / 2 = $5 per day on Friday, Saturday, and Sunday. So, his total salary for Friday, Saturday, Sunday is $5 x 3 = $15. Therefore, his total weekly salary is $40 + $15 = $55.. The answer is: 55.

Nadia is learning to play the piano. She normally makes 3 mistakes per 40 notes and can play about 60 notes a minute. If she plays for 8 minutes how many mistakes will she make on average?
Let's think:
She plays 480 notes because 8 x 60 = 480. This is 12 blocks of 40 notes because 480 / 40 = 12. She makes 36 mistakes because 12 x 3 = 36.. The answer is: 36.