ELI5 what prevents people from just submitting the lowest value hash and getting the blocks first? ELI5 what prevents people from just submitting the lowest value hash and getting the blocks first? r/CryptoCurrency

There was an example that said you pick a number 1-100 and have 3 friends guess the number for 100$

Person A picks 30 Person B picks 19 Person C picks 16

Then it goes on to say that the number was 21 so both B and C would be correct and says that just ...