Logical Venn Diagrams - Reasoning

Logical Venn Diagrams

The main aim of this section is to test your ability about the relation between some items of a group by diagrams. In these questions some figures of circles and some words are given. You have to choose a figure which represents the given words.

Some critical examples are given below:

Example 1:

If all the words are of different groups, then they will be shown by the diagram as given below.

Dog, Cow, Horse

All these three are animals but of different groups, there is no relation between them. Hence they will be represented by three different circles.

Example 2:

If the first word is related to second word and second word is related to third word. Then they will be shown by diagram as given below.

Unit, Tens, Hundreds

Ten units together make one Tens or in one tens, whole unit is available and ten tens together make one hundreds.

Example 3:

If two different items are completly related to third item, they will be shown as below.

Pen, Pencil, Stationery

Example 4:

If there is some relation between two items and these two items are completely related to a third item they will be shown as given below.

Women, Sisters, Mothers

Some sisters may be mothers and vice-versa. Similarly some mothers may not be sisters and vice-versa. But all the sisters and all the mothers belong to women group.

Example 5:

Two items are related to a third item to some extent but not completely and first two items totally different.

Students, Boys, Girls

The boys and girls are different items while some boys may be students. Similarly among girls some may be students.

Example 6:

All the three items are related to one another but to some extent not completely.

Boys, Students, Athletes

Some boys may be students and vice-versa. Similarly some boys may be athletes and vice-versa. Some students may be athletes and vice-versa.

Example 7:

Two items are related to each other completely and third item is entirely different from first two.

Lions, Carnivorous, Cows

All the lions are carnivorous but no cow is lion or carnivorous.

Example 8:

First item is completely related to second and third item is partially related to first and second item.

Dogs, Animals, Flesh-eaters

All the dogs are belonging to animals but some dogs are flesh eater but not all.

Example 9:

First item is partially related to second but third is entirely different from the first two.

Dogs, Flesh-eaters, Cows

Some dogs are flesh-eaters but not all while any dog or any flesh-eater cannot be cow.

(10-12) Five people are numbered and have some characteristics. Study the diagram to answer correctly.

Samples

10 - Which number person is smart and cute?

A – 1                 B – 2                 C – 3                D - 4

Answer − Option B

Explanation − Number 2 lies in the common area of square and circle thus bears the characteristics of both structures.

11 - Which number person is smart but neither polite nor cute?

A – 1               B – 2                C – 3             D - 4

Answer − Option D

Explanation − Number 4 lies in the circle area thus bear only the characteristics of being smart.

12 - Which number person is smart, polite and cute?

A – 1              B – 2                C – 3                   D - None of the above

Answer − Option D

Explanation − No such number is there that lies in the intersection area of all three geometrical structures.

13.Which of the following diagrams indicates the best relation between Profit, Dividend and Bonus ?

A.                    B.                      C.                         D.      

Answer: Option B

Explanation:

Bonus and Dividend are different from each other. But both these are parts of profit.

14. Which of the following diagrams indicates the best relation between Women, Mothers and Engineers ?

A.                                 B.                         C.                           D.      

Answer: Option A

Explanation:

All mothers are women and some mothers and some women may be engineers.

(15-19)Directions to Solve

In the following figure small square represents the persons who know English, triangle to those who know Marathi, big square to those who know Telugu and circle to those who know Hindi. In the different regions of the figures from 1 to 12 are given.

15.How many persons can speak English and Hindi both the languages only ?

A.        5               B.   8               C.   7               D.   18

Answer: Option A

Explanation:

Number of persons who can speak English and Hindi both only is 5.

16.How many persons can speak Marathi and Telugu both ?

A.        10                  B.          11                  C.          13                 D.           None of these

Answer: Option C

Explanation:

6 + 7 = 13.

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17.How many persons can speak only English ?

A.        9             B.     12                C.            7               D.   19

Answer: Option B

Explanation:

Number of persons were can speak English is 12.

           

18.How many persons can speak English, Hindi and Telugu ?

A.        8                      B.        2                       C.       7                     D.         None of these

Answer: Option B

Explanation:

Number of persons who can speak English, Hindi and Telugu is 2.

           

19.How many persons can speak all the languages ?

A.        1              B.    8                   C.           2                          D.    None

Answer: Option D

Explanation:

There is no such person who can speak all the languages.