122/3 is more precise because a third is a smaller measure than a half.
12 mm is the most precise.
23
They are both precise.
23 quarts, because a quart is a smaller unit of measurement.
12 + 23 = 3535 + 54 = 89
-23
23
IFC.com/trapped
No. 12 ft is precise, because the definition of 1 ft tells us that it's precisely 12 inches. Incidentally, we're hoping that the question doesn't mean to imply that 178 inches are equal to 12 ft . . .
Both amount to the same length: 12 months = 1 year (January to December).
23/12
The least common multiple of 12 and 23 is 276.