Rearrange the jumbled up letters in their natural sequence and find the odd one out.

4, -8, 16, -32, 64, ?

Direction : Study the following information carefully and answer the given questions.
Eight persons viz : Daniel, Ibrahim, Fana, George, Hiccup, Ishan, Jack and Kelvin live in on different floors of eight floor building but not necessarily in the same order. The lowermost floor of the building is numbered 1, first floor of the building is numbered 2 and the topmost floor of the building is numbered 8. They are specialized in the different subjects in the state university viz Biotechnology, Physics, Biology, Computer Science, Mathematics, Humanities, History, and Geography but not necessarily in the same order.
The one who lives on fourth floor is specialized in Mathmatics. Daniel lives on odd numbered floor but above 3rd floor. The number of person between Daniel and Humanities specialized per- son is same as number of person between denial and Ishan. The one who is specialized in Physics lives on lower most floor. Kelvin lives on an even numbered floor and he is specialized in History. There are two floors between Ibrahim and Hic- cup and Ibrahim lives above to Hiccup. Ibrahim is specialized in Computer Science. Jack lives just above the one who is specialized in Computer Science. Two floors between the one who is specialized in Computer Science and Mathematics. The one who is specialized in Geography lives on odd numbered floor. Four floors between the one who is specialized in Biotechnology and Jack. The one who is specialized in Computer Science lives on odd numbered floor. The number of floors between the one who is specialized in Geography and the floor on which Fana lives is same as the number of floors between Fana and George. Ishan lives below the floor on which Daniel lives. 

Denial lives on which floor? 

In the following question, select the word which cannot be formed using the letters of the given word.
BLACKSTONE

Question Figure

A father is 5 times as old as his son. His son is 6 years old. His son is 6 years old. After how many years, will the father be 4 times as old as his son?

Complete the series choosing the missing letter

__ aaba __ aa__ __aa

Form the given, which answer figure can be formed by folding the figure given in the question?