Verbal Reasoning - Mental Ability Questions

From the given words, select the word which can be formed using the letters of the given word.
AMPLIFICATION

Looking at a lady, Joey said, "She is the mother of my mother's mother-in-law's husband". How is the lady related to Joey's father?

Select the related word/letters/numbers from the given alternatives:
3 : 243 :: 5 : ?

In a certain code language, "DURING" is written as "GRUFQD". How is "PICKED" written in that code language?

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Biological

Find out the odd word/letters/number/number pair from the given alternatives.

If South-East is changed to North and North-East to West and so on, then what will come in place of South?

In the following question, correct the equation by interchanging two signs.
4 – 10 x 5 + 9 ÷ 3 = 51