Verbal Reasoning - Mental Ability Questions

One or two statements are given followed by two or more conclusions/assumptions, I, II, III, IV. You have to consider the statement to be true, even if it seems to be at variance from commonly known facts. You are to decide which of the given conclusions/assumptions can definitely be drawn from the given statement.

Statement:
1. All goats are tigers.
2. All tigers are lions.

Conclusion:
I. All tigers are goats.
II. All lions are tigers.
III. No goat is a lion.
IV. No lion is a goat.

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

PE_NP_ON_EO_

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

18 + 2 x 30 ÷ 6 - 4 = ?

Select the related word/letters/numbers from the given alternatives:
ECFG : FDGH :: SQTU : ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
Cell, Tissue, Organ, ?

From the given alternative words, select the word which cannot be formed using the letters of the given word:

INTROSPECTION

An army recruit is training. He starts and runs 2 km East, then 3 km South, then 5.5 km West, then 4 km North, then 3.5 km East, where is he now with reference to the starting position?

The weights of 4 boxes are 100, 70, 50 and 90 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once?