1.any ideas how to represent the above numbers as one byte.

$number10 = pack('C', 10);
# ...
$number100 = pack('C', 100);
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eg. pack a C char, it's one byte (plus the perl variable overhead itself in memory, as Abigail-II points out).

2. IF number 1 is possible-is there a specific way to measure the size of the number

$size = length($number100);
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__END__
$_=q,just perl,,s, , another ,,s,$, hacker,,print;
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