It was actually a couple of hours a day for two weeks, but I have good pattern recognition ability.
It is frustrating to see people saying it is unsolvable when the answer is so clear.
Sheldon Cooper: It wasn’t difficult. You know how when you see prime numbers they appear red but when they’re twin primes they’re pink and smell like gasoline?
Well, the answer is intuitively obvious. The tricky part is describing that answer mathematically.