Random Joke #14: Prime Numbers

Several non-mathematicians were asked to identify all the prime numbers between 1 to 100. Psychologist: 2 is prime, 3 is prime, 5 is prime, 7 is prime and 9 is prime as well though it tries to suppress it. Philosopher: I don’t really know the answer to that, but I’m glad that we can have […]

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Evil US Government Agencies?

This is a part of the lost articles I wrote on GeoCities in 2003 (Yes, it’s been fifteen years!). Those were the times when I had nothing else better to do. Unfortunately, I can’t find the original articles no matter how hard I searched through my old files. My page was also not archived by […]

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Random Joke #13: Right Triangle

Little Johnny is not so little anymore. So, now, it’s time for him to learn some algebra. Johnny’s math teacher was bemused over the answer to an exam question about right triangles that he had written. It was the single word “rhinoceros.” “Well,” the teacher said, “This is not a word that I ordinarily associate […]

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A Question for a Question: Robert Langlands’ Interview

In March 24, 1983, the New York Times published the following interview with mathematician Robert Langlands (1936- ): Q: What does a theoretical mathematician do? A: You mean what does he do or why does he do it? Q: What is your aim, your goal? A: Let me think a minute before I answer that question. Are you asking, […]

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Multiplying Cells Puzzle

A biochemist is cultivating living cells. Each cell splits into two cells after one minute. One minute later the two cells split to make four, then the four become eight, and so on. Every minute the number of cells doubles. Assume that it takes an hour for one cell to grow until a bottle is filled. If the chemist […]

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The Classic Hourglass Puzzle

Here is a classic puzzle. Say that you have two hourglasses of different sizes. The bigger hourglass runs for 11 minutes while the smaller one runs for 7 minutes. Using these two hourglasses, how can you measure 15 minutes exactly.?

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Applied Mathematics Vs. Pure Mathematics

Image: Spikedmath “If you want to see practical applied mathematics, read chemical engineering; if you want to see theoretical applied mathematics, read electrical engineering, and if you want to read pure math, read economics.” — Richard I. Pelletier

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Primes That Do Not Generate Primes When Any Single Digit Is Prepended

Giving a quick inspection at the list of prime numbers, you’d notice that 2 is the first prime number. However, prepending any single decimal digit to it would not produce other primes, that is, 12, 22, 32, 42, 52, 62, 72, 82 and 92 are composite numbers. Likewise, the third prime number, 5, also shares […]

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Pun Of The Weak: Here’s Looking At Euclid

Higgledy-piggledy Euclid Geometer Pained by the asking of “What is the use Studying the doctrines so Axiomatical?” Answered acutely, “Oh, Don’t be obtuse!” — Anthony Harrington

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Full Circle

Place 24 pigs in these sties so that, no matter how many times one circles the sties, he always find that the number in each sty is closer to 10 than the number in the previous one.

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