Can you solve these brain teasers written by the NSA’s top mathematicians?

When one thinks of institutions and places that house some of the brightest mathematical minds on the planet, one tends to think of companies like Google and academic institutions like MIT and Cal Tech. But flying somewhat underneath the radar is the National Security Agency (NSA), the famed intelligence agency that was unwittingly thrust into the spotlight following Edward Snowden's massive leak of classified NSA material. The NSA likely houses the largest group of world-class...

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