The phrase "attach a number to each" is correct and usable in written English.
You can use it when referring to the action of assigning a numerical value or identifier to individual items in a list or group.
Example: "To organize the files, please attach a number to each document for easy reference."
Alternatives: "assign a number to each" or "label each with a number".
The standard way is to assemble some proclaimed experts and have them first agree on a list of all the important factors, then attach a number to each and have the computer do the adding.
(We could attach a number to each member of an experimental population, and give the n-th member a pill of an active substance (respectively, a placebo) if the n-th draw is black (white).) But in this process, the outcomes become less and less chancy as the number of balls diminishes.
Attach a number to each kid's back and allow the teachers to put them through a series of grueling academic exercises.
It is meant to be a vital tool in the preservation of stocks, attaching a number to each catch or net-load so it can be followed from vessel to market.
And yes, you can often attach a number to their activities.
"When you attach a number to measurement," Dr. Rosenberg said, "then you've increased your ability to make rational decisions in medicine by an enormous extent".
And the moment somebody can detect something, they're going to attach a number to it, and then they make a fuss about it".
(Rachel Griffiths acquits herself well in the undemanding role of his supportive wife, Lorri.) The movie cannily doesn't attach a number to Jim's age.
Mr. Spira concedes that the $650 billion figure is a rough estimate — an attempt to attach a number to a big problem.
"A scientist or an engineer has a natural instinct to attach a number to a problem," he says.
Most of the time, passer ratings are a reasonably accurate way to attach a number to the way a quarterback played.
