What is a complement in maths?

Question

Eg what would you put for the question:

What is the complement of $16$ to $20$ ?

Thank you so much for the help if you do!

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Answer 1 · 2018-07-11T21:04:50

$1-5, 6-10, 11-15, 16-20...$

The complement of $16 to 20$

Now the difference between the range is $4$

A complement is a unique value that can be used to complement another value if not used, they have similarities..

Hence a similar or complement range is $1-5, 6-10, 11-15...$ and so on..