A person can make 100 using the digit 9 four times in an equation. The equation for this math problem is: 99 + (9 / 9) = 100. This solution works because 9 divided by 9 equals 1, and 99 plus 1 equals 100.
Know MoreSolving this math problem requires one to notice that the number 99, which contains the digit 9 repeated twice, is very close to 100. In fact, 100 - 99 = 1. The other two 9 digits must therefore equal one, and this requires a fraction. The fraction 9 over 9 equals 1. Combining these two facts in a single equation solves this math problem, with the answer being 99 + (9 / 9) = 100.
Learn more about NumbersA person who lives to be 100 is a centenarian. In 1980, there were 32,000 centenarians in the United States, but the number grew to over 52,000 by 2010, an increase of over 65 percent, while the general population grew by 32 percent.
Full Answer >The most common prefix for the number nine is "nona-", such as in the word "nonagon," which describes a polygon with nine sides, and "nonagenarian," a person in his 90s. A less commonly used prefix is "nove-," as in "novennial," which is an event that occurs every nine years.
Full Answer >The greatest nine-digit number that can be made using nine different digits is 987,654,321. Using the number zero only makes the largest possible number smaller.
Full Answer >Aryabhata was an ancient Indian philosopher and astronomer who made a wide variety of contributions, including approximating the value of Pi, asserting that the Earth makes a daily rotation on an axis and describing rules for eclipse calculations. He wrote numerous books in his lifetime, many of which are believed to be lost. He lived from about 476 to 550 A.D.
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