perplexus.info :: Just Math : Find that decade

Find that decade (Posted on 2014-01-06)

There has been only a single instance in the course of American history (1776 AD onwards) wherein there was a decade in which four of the years were prime numbers. Find that decade.

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

Look Ma, no primes!

| Comment 2 of 4 |

Ady:

I'm sure you meant that 1891, 1893, 1895, 1897, 1899 were all composite.

Posted by Steve Herman on 2014-01-06 14:09:02

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