Welcome to 2011

January 1, 2011 at 12:00 am 2 comments

An original problem to kick off the new year:

Place three operators (+, –, ×, ÷) between the digits below to make an expression equal to 2011.

1  2  3  4  5  6  7

For instance, using three + signs, you could make the expression 123 + 45 + 6 + 7, which is equal to 181.

A more standard problem to begin any new year is this:

Combine the digits of the year (in this case, 2, 0, 1, 1) to create each of the numbers 1–100. Extra credit if you can keep the digits in the same order as they appear in the year. For instance, 20 – 1 + 1 = 1 would be a way to make 1 with the digits in order, and 10 – 2 + 1 = 9 would be a way to make 9 with the digits out of order. 

I hope that 2011 brings you peace, love, happiness, and lots of problems!

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On To The Next… Most Underrated Math Joke Ever

2 Comments Add your own

  • 1. Veky  |  January 2, 2011 at 2:29 am


  • 2. Veky  |  January 2, 2011 at 2:42 am

    Here is another one: do the same with _four_ (not necessarily different) signs, instead of three. It also has a unique solution.


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About MJ4MF

The Math Jokes 4 Mathy Folks blog is an online extension to the book Math Jokes 4 Mathy Folks. The blog contains jokes submitted by readers, new jokes discovered by the author, details about speaking appearances and workshops, and other random bits of information that might be interesting to the strange folks who like math jokes.

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Math Jokes 4 Mathy Folks is available from Amazon, Borders, Barnes & Noble, NCTM, Robert D. Reed Publishers, and other purveyors of exceptional literature.

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January 2011

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