Select the related number from the given alternatives.
45 : 92 :: 52 :?

Select the Venn Diagram that best represents the relationship between the following classes.

Flowers, Stems, Roots

Find the missing number?

Seven friends M, N, O, P, Q, R and S, each has a different age. Only two people are older than Q. P is older than Q but younger than O. M is older than R but younger than S. Only three people are younger than S. N is the youngest among all. The age of how many persons is between the ages of Q and R?

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 questions, from the given alternatives select the word which cannot be formed using the letters of the given word?
MISUNDERSTAND 

How many such pairs of letters are there in the word EFFICIENCY each of which has as many letters between them in the word as there are between them in the English alphabet?

If two signs, ‘+ and ÷’ are interchanged, which of the following equation will be correct?