Math Questions and Answers

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View your most frequently asked questions on math. Our editors do the research to provide accurate answers to submitted questions.

In diamond measurement, what is a carat?
How do you convert Celsius to Fahrenheit?
How long would it take to count to a billion?
I'm an auto mechanic, and I am trying to find a chart for conversion from millimeters to fractions of inch. Can you help?
What is the measurement used by the military called a "click"? Is it a mile? A tenth of a mile?
What is the last digit of pi?
What are my exact odds of winning the New York State lotto jackpot?
I need to give my infant medicine and do not know the proper amount. I need to know how many mililiters (ml) are in 1/4 of a teaspoon. How do you calculate this conversion?
I need to know about nautical knots. Before computers, how did sailors measure them? Why are they called "knots" in the first place?
What are the Roman numerals for 50, 100, and 1,000?
In a recent academic competition, the students raised a question about Roman numerals. I immediately referred to the 1998 Information Please Almanac, and then to several other references, and could not find an answer for them. The rules you cite are well accepted and representative of what I have located in the texts. But, here are the questions the students raised that seem to be beyond the standard rules.
Do you know the weight (lbs) of a gallon of gasoline? A gallon of water? Thank you.

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Math Questions and Answers

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