High / Low Puzzles

Some guesses have been made to a number, all of whose digits are positive. Each digit either needs to be higher (), lower (), or is exactly correct (). Unfortunately, these clues have been jumbled for each guess. Find the number. A solved puzzle is shown below. Each puzzle has a unique solution. All puzzles copyright Erich Friedman, 2010.

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A.
B.
C.

D.
E.
F.

G.
H.
I.

J.
K.
L.

M.
N.

O.
P.

The solutions are here.

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