Math Chapter Wise question with answer

Q01 Given two vectors 15 x 3 9 and 15 y 9 k. For x and y to be orthogonal, value of k is– English · KVS TGT 2017 Q02 If p and q are two statements, the p ⇔ q can be expressed in Boolean algebra as- English · UPPSC Polytechnic Lecturer 2021 (I) Q03 Let G be a group we know that G is the internal direct product of two subgroups of H and K. It is not true when: English · DSSSB TGT 04-09-2021 Shift-I (Male) Q04 Let a and b two positive integers. Then gcd(a,b). lcm(a,b) equals: English · NVS PGT 10-06-2019 Q05 If a and b are two elements of a group G such that a4 = e and bab–1 = a2, then English · PGT 2013 Q06 Let H and K be two subgroups of a group G, then HK = {hk: h∈h, k∈K} is a subgroup of G iff– English · UP PCS (Pre) 2004/ PGT 2013