That number squared is 127,449 and the middle digits are 2,744.

This numbering system worked well until the telephone systems began using area codes that used numbers other than 1 or 0 as the middle digit.

All the fingers were folded except for the middle digit, which was extended.

The middle digit corresponded to the generation of the Alpha architecture.

Stiff hairs project over the three middle digits of the rear feet.

He wrote the number of the box on a piece of paper and circled the two middle digits.

The three middle digits are much longer than the outer two.

One version begins the phone number and another is used for the middle digits.

He stopped, felt something, barely perceptible, against the tip of his middle digit.

At the same time, local exchanges were allowed to use 1 or 0 as a middle digit.