January Mystery of the Month

January 2017
Mystery #46: Five More Minutes of Mysterious Math!

Selected from:
One Minute Mysteries:
65 Short Mysteries You Solve With Math!

Cold as Ice

“Now we have to pour the salt into the water.” Mr. Kaufman was leading his class in an experiment to see whether water would freeze at a different temperature if salt was added to it.

“Good, good!” he said when the water finally froze. “So we have now proven by experimentation that putting salt in water makes it freeze at a lower temperature—28 degrees, in our trials. Now don’t forget that you have to write a lab report on what we’ve done, and it is due tomorrow!”

The class groaned as they packed up their books to go. In the hall, Julian ran up to Katherine and asked her what temperature scale they were supposed to write their lab report in. “I’d say we should write it in Celsius,” she said. “That’s more commonly used in science than Fahrenheit.”

“Okay, thanks Katherine,” he said.

When Julian got home, he wrote up his paper describing how they had made water freeze at 28 degrees Celsius.

The next day in class, Mr. Kaufman asked Julian for his paper. At first glance, he said, “Okay Julian, see me at lunch.”

“Uh-oh,” Julian thought. “What does he want to say to me?”

Can you figure out the answer?

If you enjoyed solving this mystery, there are a lot more in the "One Minute Mysteries" Series. All books are available as paperbacks and eBooks.

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