Sentence examples for are hard to solve from inspiring English sources

Suggestions(5)

are harder to solve

are difficult to solve

are hard to convert

are hard to follow

are hard to design

The phrase "are hard to solve" is correct and usable in written English.
You can use it when discussing problems, puzzles, or challenges that require significant effort or skill to find a solution.
Example: "Mathematical equations can sometimes be very complex, and certain problems are hard to solve without advanced knowledge."
Alternatives: "are difficult to resolve" or "are challenging to tackle".

Exact(23)

Some problems are hard to solve.

The Washington Post

These methods require complex initialization procedures and they are hard to solve.

Computer Aided Chemical Engineering

The practical control problems are hard to solve using analytical approaches.

IFAC Proceedings Volumes

It is just that the problem general methods are hard to solve.

Practical Design of Ships and Other Floating Structures Proceedings of the Eighth International Symposium on Practical Design of Ships and Other Floating Structures 16 – 21 September 2001 Shanghai, Chaina

These clues are easy to spot, even if they are hard to solve, because the word Spooner or spoonerism will alert you to what is required.

The Guardian

Routing problems constitute an important class of problems because they are hard to solve and have a wide variety of real-world applications.

Neurocomputing

Similar(37)

(Murders are harder to solve).

The Guardian - Film

Our numerical results indicate that the ring models are harder to solve with CPLEX than the tree and star ones.

Applied Soft Computing

For too long, overly ambitious global climate talks have focused on the aspects of global warming that are hardest to solve.

The New York Times

Experts said it might stop people using weak passwords but could lead to other loopholes that are harder to solve.

BBC

If there ever was a problem that's hard to solve, it's climate change.

Massachusetts Institute of Technology

More suggestions(16)

are hard to quantify

are hard to spread

are hard to replace

are hard to verify

are hard to pick

are ready to solve

are hard to change

are hard to measure

are hard to replicate

are able to solve

are hard to prosecute

are hard to shake

are hard to come

are hard to surprise

are hard to ignore

are hard to entice

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