Verbal Reasoning - Mental Ability Questions

In a certain code language, '-' represents '+', '+' represents 'x', 'x' represents '÷' and '÷' represents '-'. Find out the answer to the following question.

2 - 12 + 10 x 5 ÷ 12 = ?

In a certain code language, "NUMBER" is written as "156897" and "BARREN" is written as "847791". How is "RUBBER" written in that code language?

Three of the following four are alike in a certain way and hence form a group. Which is the one that does not belong to that group?

How many spaces are required between punctuation?

Which of the diagrams given below correctly represents the relationship among WOMEN, MOTHERS, SPINSTERS

Choose the word which is least like the others word in a group?

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 ?

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 ?