Verbal Reasoning - Mental Ability Questions

If 324⊕289 = 35, 441⊕484 = 43, then 625⊕400 = ?

A chord that passes through the center of a circle is

All the six members of a family A, B, C, D, E and F are travelling together. B is the son of C but C is not the mother of B. A and C are a married couple. E is the brother of C. D is the daughter of A. F is the brother of B.  Which of the following is a pair of females ? 

Which sentence was written correctly?

Pointing to a woman, a girl says,"She is mother of the only child of my father-in-law." How is the woman related to the girl?

An electronic device rearranges numbers step-by-step in a particular order according to set of rules. The device stops when the final result is obtained.

Input: 84 15 35 04 18 96 62 08
Step 1: 96 84 15 35 04 18 62 08
Step 2: 96 84 62 15 35 04 18 08
Step 3: 96 84 62 35 15 04 18 08
Step 4: 96 84 62 35 18 15 04 08
Step 5: 96 84 62 35 18 15 08 04
And Step 5 is the last step for this input. Now, find out an appropriate step in the following question following the above rule.

Question:
Input: 16 09 24 28 15 04
What will be the third step for this input ?

A man walks 20 m towards north, then he turns right and walks 3 m, then turns left and walks 4 m and from there he walks 4 m towards east. How far and in which direction is he from his initial position?

Assertion(A) : Most of the Himalayan rivers are perennial.
Reason(R) : They are fed by melting snow.