State true / false:If A = {3, {4, 5}, 2} then `{4, 5} in A`

State true / false: NcancelsubZ

State true / false:If a set has only one subset then it is a null set

State true or false: R={(a,b) : a,b in A, |a-b| <5} is an universal relation in the set A={x : x in R, -50

State true or false: R={(a,b) : a,b in A, a-b=2} is neither an empty relation nor a universal relation in the set A={0,1,2,3,4,5}

State true or false: R={(a,b) : a+b=5} is an empty relation in the set of whole numbers.

State true or false If square of a number ends with 5, then its cube ends with 25.

State true / false: AsubeB , BsubeCimpliesAsubeC

State true or false : For any integer m, m^2 < m^3 . Why?

State true or false Cube of any odd number is even.

State whether true or false. (-x)|x|=x^2 .