100 Day Summer Challenge

100 problems in 100 days. #100problems

Day 64

64 of 100: Prime Octet

\[\begin{array}{cc} \Large &\color{red}A \color{black} = 8! + 3 &\color{teal}E \color{black} = 8! + 7 \\
\Large &\color{orange}B \color{black} = 8! + 4 &\color{blue}F \color{black} = 8! + 8 \\ \Large &\color{gold}C \color{black} = 8! + 5 &\color{violet}G \color{black} = 8! + 9 \\ \Large &\color{green}D \color{black} = 8! +6 &\color{purple}H \color{black} = 8! + 10 \end{array}\]

How many of these eight numbers are prime?

For your own safety and well-being, do not use a calculator on this one!

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