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A cool prime number (Posted on 2011-01-27)

My friend was thinking of a 3-digit prime number. I asked him, "What are the last two digits of your number?" He answered, and I knew what the number was. What was the number?

Submitted by Math Man

Rating: 4.0000 (2 votes)

Solution: (Hide)

389. It is the only 3-digit prime ending in 89.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Possible solution	broll	2011-01-28 01:53:12
Solution	Dej Mar	2011-01-27 18:09:08
Solution (Using Excel)	hoodat	2011-01-27 15:13:26

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