Aptitude and Reasoning Questions

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

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

If a+b=5 then the value of a-37+b-27 is

In each of the questions below are given three statements followed by three conclusions numbered I, II and III. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements:
Some bags are plates.
Some plates are chairs.
All chairs are tables.

Conclusions:
I. Some tables are plates.
II. Some chairs are bags.
III. No chair is bag

If x+1x = 4, then what is the value of x6+1x6 ?

Rs. x invested at 8% simple interest per annum for 5 years yields the same interest as that on Rs. y invested at 7.5% simple interest per annum for 6years. Find x : y.

Average of the height of 251 students of a school is 48. If the average of the height of the boys is 51 and the average of the height of the girls is 29, then what will be the ratio of the total height of boys and the total height of girls respectively?

Rohit buys a ball for Rs 450 and sells it. Rohit gives two successive discount of 20% and 5% to the customer. What will be the selling price (in Rs) of the ball?