If this is supposed to be a speed challenge I'd suggest reducing the time. I wouldn't go any higher than 30 seconds.That's enough time to make it possible but still make it somewhat challenging.
It is fine though, if you are fast enough to do it in less than 30 seconds, it wouldn't really change how quick you do it but for some people, it isn't even enough, but, I see your point and you are not wrong in loads of ways (and you are a higher level than me so there can be tons of ways how I could be wrong).
If you have a 10 key number pad, this is not hard at all. If all you have is the numbers along the top of your keyboard, this is actually pretty challenging.
Depends on how fast you type though. If you can type at a moderately fast pace and can do math semi-quickly, you'll be able to complete this quiz. But it definitely can be challenging if your typing speed is slow, regardless of how good you are at fast math.
Or if you’re used to having to type numbers consecutively on a “top-row-numbers” keyboard like those of us who regularly export audio files from one software program to another, and need them all assigned a correct number in the sequence to make an album.
The quiz is more about how fast your calculations are, not how fast you can type. I did it in 33 seconds, on the first try, and I don't have a numerical keyboard.
(I even had to reach 111 twice last week!)
Also mobile for this sucks cuz you click the wrong one and have to delete