List of top Logical Reasoning Questions on Venn Diagrams

All needles are threads, All threads are boxes. All trees are boxes.
(A) No needle is tree.
(B) Some trees are threads
(C) Some boxes are needles
(D) Some trees are needles

Consider the following information :
Set A: Animals that can fly
Set B: Birds
Set C: Animals that live in water
Using Venn diagrams, represent the relationships between these sets and answer the question.
Which region(s) in the Venn diagram represents animals that can fly and also live in water ?

If A and B are represented by the above diagrams as two circles then shaded area is represented as?

In a school students at Pioneer career Kolkata wrote Mock test which has three subjects DI, VA and QA, here is the result of these students. 80 students cleared cut off in DI, 70 in VA and 60 in QA. Only 40 students cleared all the three subjects. 10 students failed to clear cut off even in one subjects. 50 students cleared cut off in VA and QA. 5 students cleared in cut off in only QA.

Staff employed in a UNESCO office in Paris are represented by four intersecting circles as in the given diagram. Each circle represents people who can read and write English, French, Spanish and Russian. Strength of people in each circle is also shown alongside. Study the diagram to answer the questions that follow.

No national productivity measures are available for underground industries that may exist but remain unreported. On the other hand, at least some industries that are run entirely by self - employed industrialists are included in national productivity measures. From the information given above, it can be validly concluded that

60 employees in an office were asked about their preference for tea and coffee. It was observed that for every 3 people who prefer tea, there are 2 who prefer coffee. For every 6 people who prefer tea, there are 2 who drink both of tea and coffee. The number of people who drink both is the same as those who drink neither.
How many people drink both tea and coffee?

A placement company has to assign 1000 SW personnel who are skilled in Java and Dot Net to a prospective outsourcing company. He finds that 750 are having Dot Net skills and 450 have Java skills. Some have skills in both Java and Dot Net. Find the numbers who have skills in both Java and Dot Net.

Answer the following questions based on the information given below.
In the diagram below, the circle stands for ‘educated’, square stands for ‘hard working’, triangle for ‘urban people’ and rectangle for ‘honest’. The different regions of the diagram are numbered from 1 to 12. Study the diagram carefully and answer the questions: