Math Chapter Wise question with answer

Q01 A poset (L, ≤) becomes a lattice when every non-empty finite subset of L has: English · OPSC PGT 2017 Q02 Which of the following statement is/are true? I: If B is countable subset of an uncountable set A, then A – B is co... English · UPPSC GDC 2021 Q03 For every pair of elements a and b, DeMorgan's laws in Boolean algebra are: English · OPSC PGT 2017 Q04 In the additive group of integers the order of every element except zero is English · UP PGT-2016 (02-02-2019) Q05 Index of every element of a finit group is English · PGT 2003 Q06 Every subgroup with index 2 is English · Rajasthan TGT 2016