Time for MATH MINUTE! (provide your favorite theme music here).

Get out your paper & pencil because I have a new puzzle for you!!

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PUZZLE #15 Guess my favorite number Jan.22 -26

Can you guess my favorite number??

Alright, here is a hint.

It is a prime number, this means it is a whole number bigger than 1, and is only divisible by 1 and itself.

For example 6 is not prime, but 7 is prime.

Got it yet?

OK, OK, another hint.

When you multiply my favorite number by the number which is 1 larger and divide this product by 2 you get another prime number.

That is, when you compute

(my prime)(my prime+1)/2

you get another prime number.

Now, what is my favorite number??

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       Send your comments, ideas and solutions before Monday Jan. 29 to the email address, parksjm@potsdam.edu , and in the subject line be sure to put:  < MM > .

Visit us here online at 

http://www2.potsdam.edu/parksjm/MM.htm

to see the results every Monday.

       See you next time on MATH MINUTE!  (theme music fades out here).