the one that doesn't exist
The hardest toy to find is a special attack infinity dragonoid.
the hardest Pokemon to find is regigigas you can only get him after finding all the other Pokemon and you can find him in the hippodow temple
latias
feebas
No.
a great mullein
The hardest drink for any given person to make is the one with the hardest to obtain ingredients. If something is hard to find it is hard to put it in a drink.
Mesprit & Cresselia (legendary)
human interaction
Play it and you will find out you can
There is no such thing as a hardest fraction. Something which you find hard someone else may find easy and something which that person find hard some third person might find easy and so on.
Different people find different things difficult. So what you might find difficult someone else might find easy. And, what someone else finds difficult, you might find easy. As a result, there is no hardest quiz.