Interview Question

Graduate IT Consultant Interview

-London, England, England

FDM Group

This question came up in the set venn diagram test. Out of 120 students, those with ID's that are even numbers are doing Physics, and all with ID's divisible by 5 are doing Chemistry, and all with ID's divisible by 7 are doing Maths. How many are doing Physics AND Maths? How many are doing Maths and Chemistry? How many are doing neither subject? etc..

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5 Answers


This last method is simpler, thanks

Anonymous on


How you did that??? I'm so confused with all these maths. Any help???

not a genius on


I got the same & also 3 (not 2)

Tab on


Assuming the ID's range from 1-120: Number of students taking Physics: 60 (there are 60 numbers between 1-120 that are divisible by 2) Chemistry: 24 (only 24 numbers between 1-120 that are divisible by 5) Maths: 17 Physics and Chemistry: 12 Physics and Maths: 8 Chemistry and Maths: 2 All three subjects: 1

Jane on


I got all the same expect Chemistry and Maths where i got the answer as 3. Could you please explain your working? Thanks

David on

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