This problem is a real challenge.とは 意味・読み方・使い方

It is difficult to solve this problem.

This problem is too difficult for me.

Why don't you try this question?

I found great difficulty in solving this problem

I found it very difficult to solve this problem.

This problem seems difficult.

It's difficult for me to solve this problem.

We must solve this problem first.

The way to solve this problem is to take things one step at a time.

This problem is a real challenge.

The problem does not admit of [does not brook] a moment's delay.

This is a matter that demands [calls for] careful consideration.

This is the hardest question.

This is a puzzling question―a perplexing problem.

This question would be difficult for anyone.

I am at loss for a solution of the problem―perplexed how to solve the problem.

This is a difficult problem to solve.

The question calls for immediate solution.

These problems are well on their way to solution.

This question is too difficult for me.

That problem is too difficult for me.

This problem is unexpectedly serious.

This question is infuriatingly difficult.

This is a difficult problem, isn't it?

This problem is too hard.

This is a hard nut to crack.

I really don't know how to handle [solve] this question.

This problem will be solved.

It is tough for me to deal with this problem.

This problem is very serious.