The phrase "a variety of different problems" is correct and usable in written English.
It can be used when discussing multiple issues or challenges that vary in nature or type.
Example: "The research team encountered a variety of different problems during the experiment, ranging from equipment malfunctions to unexpected results."
Alternatives: "a range of issues" or "multiple types of problems".
Women have highlighted a variety of different problems on online forums discussing this issue.
The snappy acronym disguises the fact that young people are faced by a variety of different problems.
These tools are also relevant in the analysis of a variety of different problems in other streams of research.
Since Kiguradze's groundbreaking work, there has been a significant growth in the theory of nonautonomous differential equations with deviating argument covering a variety of different problems; see [2 14] and the references therein.
Roughly in the middle of this bias/variance trade-off dilemma, one finds regression tree-based models and extensions (bagging, boosting, random forests) to be some of the best predictive methods on a variety of different problems.
Since everyone giving up meat is off the table, the researchers mentioned a variety of different problem-solving approaches to make up the difference.
While different individuals face a variety of different health problems, there is a common denominator the number of health problems increases with aging and increases faster in those individuals whose health is poor (Yashin et al. 2007a; Kulminski et al. 2007).
The emerging new generation of robots employed in the public as well as in the private environment is called to interact with the man and should therefore be able to manage cooperative tasks and to deal with a variety of different control problems.
Eating fast food on a regular basis can lead to a variety of different health problems including obesity.
They come to the Educational Establishment for Juveniles of the Penitentiary Department with a variety of different personal problems and attitudes.
These theorists argue that it is the function of political authorities to get people to act in certain ways so as to solve various collective action problems such as a variety of different types of coordination problems, assurance problems and free rider problems.
