Martin H. Eastburn wrote:

Yep - min to max. Half way - yes no - move to the next half point
closer or further.
You will be there in 7 or less tests.

In 7 tests you could isolate to 1 of 128 possibilities. To find which
of N possibilities, you would need log-base-2 of N, tests. Rounded up.

But that's what you meant, right?

Bob