In some cases, it may be useful to know how exact the final significant digit is.

The final digit is the last number of the total handle for the first three horses in the first seven races.

After keying in 9 and 1, Mitch hesitated, but then entered the final digit.

The bare brick wall in front of him seemed to dissolve when he hit the final digit.

Stabbing the keys, he punched in the final digits.

As the final digit flickered into sight, Rick broke the rules, too.

A woman answered on the third ring, repeating the four final digits of the number and asking if she could help me.

The final digit would again denote variants of that design.

In this section, an "X" at the end of a number means one or more final digits yet to be agreed upon.

In many cases the final digit of any constant is yet to be agreed, so it has been represented by an "X"