which sentence is right?

[wwg139580]

Hello,
Which if the two sentences is right or both are right?
1.The exercise is too difficult for anyone of us to do.
2.The exercise is so difficult that none of us can do it.
Thanks in advance

[basharath2]

yes, both are right.

[wwg139580]

yes, both are right.

Thank you a lot. but I met with the two sentences in an exam paper and I have to choose one of them. I wish that the examiner has made a mistake.

[Tdol]

The answer they're looking for is b). I imagine that they would prefer 'any (one) of us' instead of 'anyone'.