一个长方体的地面积是21,另外,其中一个面的面积是30.
请问体积是多少?答案是220.
1,Theareaofthebaseoftherectangularboxis21andtheareaofoneofthefacesis30.Eachofthedimensionsj,k,andlisanintegergreaterthan1.Whatisthevolumeoftherectangularbox?(答案是220)
Ifn>1andeachofthethreeintegersn,n+2,n+4isaprimenumber,thenthesetofthreesuchnumbersisclaaeda"primetriple"Therearehowmanydifferentprimetriples?(答案是1)