In a graduation ceremony, each graduate can bring their 2 parents. Twenty teachers and half as many administrators will also attend the graduation ceremony. If there are 50 graduates, how many chairs must be prepared for the ceremony? Give the rationale and then the answer.
Let's think step by step. There will be 50 x 2 = 100 parents that are expected to attend. 20 / 2 = 10 administrators will attend. Hence, 50 graduates + 100 parents + 20 teachers + 10 administrators = 180 chairs must be prepared.. The answer is: 180.

A store is comparing their profits throughout the year. They had profits of $1,500 in the first quarter of the year, $3,000 in the third quarter, and $2,000 in the fourth quarter. If their annual profits are $8,000, how much profit, in dollars, did they make in the second quarter? Give the rationale and then the answer.
Let's think step by step. In the three quarters we have figures for, the store made a total of $1500 + $3000 + $2000 = $6,500. Subtracting this from their annual profit shows that they made $8000 – $6500 = $1,500 profit in the second quarter.. The answer is: 1500.

There are 60 passengers on a bus. Children make up 25% of the bus riders. How many adults are on the bus? Give the rationale and then the answer.
Let's think step by step. The number of children on the bus is 60 passengers * 25% = 15 passengers. The number of adults on the bus is 60 passengers - 15 passengers = 45 passengers.. The answer is: 45.