q.1, the number of three digit numbers of the formXYZ such that X<Y AND Z<OR=Y is?q.2, three digit numbers in which the middle one is a perfect square are formed using the digits 1 to 9 .their sum is?q.3,20 persons are to be seated arpound a circular table .out of these 20 two are brothers then no.of arrangements in which there will be atleast three persons between the brother is?

kotesh marikala , 13 Years ago

Grade 12