Aptitude and Reasoning Questions

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Hydrogen, Helium, Lithium, ?

What should be added to 3(x­ - 2y) to obtain 2(3x + y) -­ 5(2x + 3)?

The radius and height of a solid cylinder are increased by 2% each. What will be the approximate percentage increase in volume?

There are 6 taxi companies (A,B,C,D,E,F) in a certain city. The bar graph shows the number of taxis run by each of these six companies. Study the diagram and answer the following questions.

Even if A and C decide to merge, still D will have how many more taxis (in %) than the merged A and C entity?

In the following question, two statements are given each followed by two conclusions I and II. You have to consider the statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.

Statement:
(I) All young scientists are open-minded.
(II) No open-minded men are superstitious.

Conclusions:
(I) No scientist is superstitious.
(II) No young people are superstitious.

Two circles are drawn with the same centre. The circumference of the smaller circle is 44 cm and that of the bigger circle is double the smaller one. What is the area between these two circles?A. 154 square cmB. 308 square cmC. 462 square cmD. 616 square cm

In the question, a word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g., L can be represented by 12,24, etc., and 'R' can be represented by 55, 67, etc.
Similarly you have to identify the set for the word 'TONE'

In the following question below are given some statements followed by some conclusions. Taking 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 conclusion logically follows the given statements.
Statements:
I. Some pens are pencils.
II. All pencils are erasers.
Conclusions:
I. Some pencils are not pens.
II. Some erasers are not pens.