Add a letter to find boats here Remove the last to end up irrational Remove the first two and it's still irrational

A word I know, six letters it contains, remove one letter and Twelve remains. What is it?

I may lack a heart, but I have utility. A Sin with no I. I am number fifty. With ker, you’ll get a knack. If you’re crazy, I might even be a hat.

The musketeers The points of a triangle The blind mice The primary colors The sides of a trident The wishes from a genie The strikes and you’re out The laws of motion The stooges The pigs in the fairy tale The meals in a day The acts of a play The bears’ bowls of porridge The hearts on a triforce Now add one number, you get what im looking for.

How many do you see can you count them all I dare you to try it would take you a lifetime if you dared. Think of the night sky and all the stars you see how many of me do you see