Question: Last week, Mr. Sanchez bought 6 feet of rope for their class activity. He found that he lacks rope for the activity so this week, he bought 4 feet less than last week. Since there are 12 inches in a foot, how many inches of ribbon did Mr. Sanchez buy in all?
Answer with step-by-step thinking: Mr. Sanchez bought 6 - 4 = 2 feet of rope. He bought a total of 6 + 2 = 8 feet of rope. In inches, this is equal to 8 x 12 = 96.
So the answer is 96.


Question: In a school, the number of participants in the 2018 Science Quiz Bowl was 150. There were 20 more than twice the number of participants in 2019 as there were in 2018. In 2020, the number of participants was 40 less than half the number of participants in 2019. How many more participants were there in 2019 than in 2020?
Answer with step-by-step thinking: Twice the number of participants in 2018 is 150 participants x 2 = 300 participants. The number of participants in 2019 was 300 participants + 20 participants = 320 participants. Half the number of participants in 2019 is 320 participants / 2 = 160 participants. The number of participants in 2020 was 160 participants - 40 participants = 120 participants. There were 320 participants - 120 participants = 200 more participants in 2019 than in 2020.
So the answer is 200.


Question: The teacher divided the students into four groups. One group had 5 students, another 8 students, and the third 7 students. If there were 24 total students, how many students were in the fourth group?
Answer with step-by-step thinking:
There are 5 + 8 + 7 = 20 students in the first three groups. There are 24 - 20 = 4 students in the fourth group.
So the answer is 4.