Answer the following question.
Jessie's community built a new hedge. Each section of the hedge used 30 pieces of concrete blocks that cost $2 per piece. The hedge has eight sections. How much did they spend on the concrete blocks?
Step-by-step reasoning process: They used 30 x 8 = 240 concrete blocks for the eight sections. So, they spent 240 x $2 = $480 on the concrete blocks.
The answer is 480.

Answer the following question.
Shawn collected 40 plain pebbles. He painted 9 pebbles red and 13 pebbles blue. He then divided the remaining pebbles equally into 3 groups, and painted them purple, yellow, and green. What is the difference between the number of blue and yellow pebbles?
Step-by-step reasoning process: After painting the red and blue pebbles, Shawn had a remainder of 40 - 9 - 13 = 18 pebbles. He painted 18 / 3 = 6 pebbles yellow. The difference between the number of blue and yellow pebbles is 13 - 6 = 7.
The answer is 7.

Answer the following question.
Yoque borrowed money from her sister. She promised to pay it back in 11 months including an additional 10% of the money she borrowed. If she pays $15 per month, how much money did she borrow?
Step-by-step reasoning process: In 11 months, Yoque will pay a total of $15 x 11 = $165. The amount $165 is 100% + 10% = 110% of the money she borrowed. So, 1% is equal to $165 / 110 = $1.50. Hence, Yoque borrowed $1.50 x 100 = $150.
The answer is 150.

Answer the following question.
Three old cars displayed in an auction event have different manufacture dates. The first car, made in 1970, was made 10 years earlier than the second car. The third car was manufactured 20 years later after the second car was manufactured. Calculate the year that the third car was made.
Step-by-step reasoning process: If the first car was made 10 years earlier than the second car, then the manufacture date for the second car is 1970 + 10 = 1980. The third car was manufactured 20 years after the second car was made, which is 1980 + 20 = 2000.
The answer is 2000.