The phrase "an efficient answer" is correct and usable in written English.
It can be used when referring to a response that is effective and quick in addressing a question or problem.
Example: "In order to save time, I would appreciate an efficient answer to my query."
Alternatives: "a concise response" or "a quick solution".
He says: "There are plenty of operators who recognise that bike is an extremely efficient answer, you have just got to find the right bike.
The cognitive radio (CR) technique is considered as a better and more efficient answer to the predicament brought by the high demands of wireless communication services and the scarcity or low utilization of frequency spectrum resources.
The most efficient answer to terrorism might be good intelligence and clandestine action against the networks of money that feed terrorism.
The second concerning withenantiopure ligands for asymmetric catalysis offers efficient answers to the needs of the pharmaceutical and agrochemical industries for chiral drugs, herbicides, and pesticides.
Within a scenario of resource scarcity, huge budgetary constraints and other public choices of equivalent priority to that of combating wildfires, new wildfire management strategies seem necessary to achieve efficient answers to the increasing complexity of the economic and technical Mediterranean forest fire framework.
They began to ask the "right" questions, that led to appropriate and efficient answers [ 31].
Record linkage of existing individual health care data is an efficient way to answer important epidemiological research questions.
And yet this is, in so many ways, the perfect trailer: because it tells me that this is going to be two hours (possibly more!) in the company of someone who I feel so little sympathy for, I believe that a swift smack in the chops might have been the universe's more time-efficient answer than a year-long sabbatical.
