State validity of the followings: (i) 35 is divisible by 7 or 8

Write the truth values of the negation of the followings: (iii) 42 is divisible by 8

State validity of the followings: (iii) A quadrilateral is a rectangle if and only if it is equiangular.

State validity of the followings: (ii) 7 and 8 are factors of 56

State validity of the followings: (vii) All men and women are not mortal.

(n^2-1) is divisible by 8,if n is

Prove by the principle of mathematical induction that for all n in N. 3^(2n)+7 is divisible by 8 for all n in N .

Write the truth values of the followings: (i)' 8 + 2 = 7 rarr New York is in India.

Prove by the principle of mathematical induction that for all n in N. (2^(3n)-1) is divisible by 7 for all n in N .

Find the square of the following numbers: 35

State which of the following sets are closed under the operation : division R,Z,N,Q,W,C,R-{0}