Jeff is collecting matchbox cars. He has twice as many cars as trucks. He has 60 total vehicles. How many trucks does he have? Give the rationale and then the answer.
Let's think step by step. The number of trucks + 2(number of trucks) = 60. Therefore 3(number of trucks) = 60. Number of trucks = 20 because 60 / 3 = 20.. The answer is: 20.

Abigail built 10 fences. Each fence took her 30 minutes to build. If she builds fences for the next 8 hours, how many fences would she have built in total? Give the rationale and then the answer.
Let's think step by step. 8 * 60 = 480 minutes are in the next 8 hours. Abigail builds 480 / 30 = 16 fences. Abigail will have built 10 + 16 = 26 fences in total.. The answer is: 26.

Yun had 20 paperclips initially, but then lost 12. Marion has 1/4 more than what Yun currently has, plus 7. How many paperclips does Marion have? Give the rationale and then the answer.
Let's think step by step. Yun has 20 - 12 = 8 paperclips. Marion has 8 / 4 + 7 = 9 paperclips.. The answer is: 9.