Isn't saying you can pass Level 1 Korean History in 3, 5, or 7 days just bragging?

There is so much content, how on earth can anyone finish it in 3 days for Level 1 or 5 days for Level 1? ㄷㄷㄷㄷ
It took me a whole month to finish all the lectures and go through the concept books, and when I tried solving some past exam questions, I only got in the 50s.
You need over 80 points to get Level 1 ㄷㄷㄷ
For reference, my take-home pay is 2.1 million won.