The phrase "a required number" is correct and usable in written English.
It can be used when specifying a number that is necessary or mandatory for a particular context or situation.
Example: "To complete the application, please provide a required number of references."
Alternatives: "an essential number" or "a necessary number".
Each just needs to collect a required number of signatures based on the number of voters in the last gubernatorial election.
"Because training regulations note that 'many new soldiers are not physically fit or capable of strenuous activity,' " she writes, "they no longer do a required number of push-ups to a count, the drill sergeant exercises along with them as a sort of 'role model' and they drop out when they feel like it".
Citizens' initiatives that are supported by a required number of signatures allow the electorate to vote on political measures proposed by a group, on bills approved by a legislature but not yet in force, or on existing laws (citizen-demanded referendums).
It provides a required number of resources for critical and excessive computations.
A power analysis was performed and resulted in a required number of 44 included patients.
The threshold is dynamically adapted to meet a required number of phase spectral components for a given resolution.
However for any drive with a given center distance and a speed ratio, only two non-standard asymmetric rack cutters, one for the pinion and other for the gear are used to generate a required numbers of pinion and gear with different cutter shift values for the purpose of optimization.
With an appropriate safety-margin a total required number of 650 patients results.
We built a bioinformatics pipeline to systematically analyze a range of SCD definitions, where SCD definitions were defined by a maximum length (Y) and a minimum required number of S/T-Qs.
This resulted in a maximum required number of replicates of 9.62 with an actual accuracy of 0, and a minimum required number of replicates of 0.004 with an actual accuracy of −0.99 or 0.99.
The key points in such an optimization process are using a fast function evaluation tool and development of an efficient and robust optimization algorithm that can find good solutions with a minimum required number of function evaluations.
