Question

What is the Code ??

If I have 10 and you have four,
then I have how many more?
If either side are 5 and 7,
what is the middle? it's far from heaven!
If 2 more times the trio arrives
what sounds like the flu or hives?
If I wanted to call the devil
I'd pick a number then I'd treble

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Answer 1

Code is...

76543217654321

Answer 2

Answer:

$\huge\boxed{\mathfrak{\red{\fcolorbox{red}{pink}{HEY\:MATE}}}}$

Explanation:

76543217654321