Math Chapter Wise question with answer

Q01 In order to define an equivalence relation R on a non-empty set A, which of the following is not required: English · UP PCS (Pre) 2005 Q02 Which of the following is not a set? English · Bihar (TRE 2.0)-2023 Q03 If A = {1, 2, 3} and B = { 4, 5, 6}, then which of the following is bijective function? English · Bihar (TRE 2.0)-2023 Q04 Which of the following is an odd function? English · RPSC PGT 2022 Q05 Which of the following is true English · DSE TGT 2022 Q06 If A and B are two sets such that A×B = φ, then which of the following must be true? English · DSE TGT 2022