Reasoning and answer: Since 1 hour is equal to 60 minutes, then 45 minutes is equal to 45 / 60 = 0.75 hours. Then, the speed in kilometers per hour is 1.5 km / 0.75 hour = 2 kilometers per hour.
The answer: 2
What was the question?
Question: A boy runs 1.5 km in 45 minutes. What is his speed in kilometers per hour?

Reasoning and answer: Green = 156 cm. Red = 3 * 156 + 8 = 476 cm. 156 + 476 = 632 cm of yarn. The two pieces of yarn have a length of 632 centimeters.
The answer: 632
What was the question?
Question: The green piece of yarn is 156 cm long. The red yarn is 8 cm more than three times the length of the green yarn. What is the number of centimeters in the total length for the 2 pieces of yarn?

Reasoning and answer: The range of scores is the difference between the highest and the least score so 75 = 98 - least score. Then the least score = 98 - 75 = 23. Mark scored twice as much as the least score which is 2 * 23 = 46.
The answer: 46
What was the question?
Question:
In a math test, Mark scored twice as much as the least score. If the highest score is 98 and the range of the scores is 75, what was Mark's score?