Question

in school it is told that for question number 6 which set of numbers will be the universal set for the set given below? A= to set of multiple of 5 Set B= to multiples of 7 and Set C= to multiples of 12 so can we write answer as real number, instead of natural numbers, integers, rational number, and whole number??

Answer 1

Dear student,

Since 5,7 and 12 are coprime to each other, hence the HCF of 5,7 and 12 is 1 and hence thereis nothing common between multiples of 5,7 and 12. So the universal set for all the sets A,B and C can be the set of all real numbers because it includes A,B and C.

So you can definiitely write it as your answer.

Regards

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