There's only ONE of these around. Not because it's hard to find, but rather it's more one of a kind. If you are you from my perception, then I am this, from own reflection.

A word I know, six letters it contains. Subtract just one, and twelve is what remains.

I am the invisible paint on the canvas of silence. I can travel through walls without a door and touch your heart without a hand. I am made of math, but I feel like magic. What am I?

Measure me or scan me then add me up. That will tell you how many there is for you to spare at dinner time. Maybe skip the dessert. Too many of me in there

Eleven siblings have I And I am number ten I should have been the eighth But we got jumbled up again Between the last and first of us They always drop the ball And just before I rest the Weird and wicked come to call What am I?