Question

Just before midnight, the first musher, William “Wild Bill” Shannon, left Nenana. It was -50ºF. When he took his first break, it was 12º colder. What was the temperature?

Answer 1

Getting colder means there was temperature reduction
(ie the hotter the temperature the higher its value and the colder the temperature the lower its value)
Hence the temperature was
= -50 - 12
= -62 °F

Answer 2

-62°F

Explanation:

it said it got colder so it got lower not higher