sets I am not getting how to do solve these problems based on sets
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Hey! Look,
For example the 6th question,
They've said that x is an odd number less than 15. That mean that the set could be {....1,3,5,7,9,11,13} since these are the odd numbers less than 15. Thus, 4 does not belong to A. 11 belongs to the set A. 15 does not belong to A since they've said that the number is less than 15. Also 5 belongs to A.
Similarly the next question.
The 2nd and 3rd options belong to X.
Question 8)
(I) {x: 2 = x = 8}
Similarly the rest of the questions.
Hope this helped.
For example the 6th question,
They've said that x is an odd number less than 15. That mean that the set could be {....1,3,5,7,9,11,13} since these are the odd numbers less than 15. Thus, 4 does not belong to A. 11 belongs to the set A. 15 does not belong to A since they've said that the number is less than 15. Also 5 belongs to A.
Similarly the next question.
The 2nd and 3rd options belong to X.
Question 8)
(I) {x: 2 = x = 8}
Similarly the rest of the questions.
Hope this helped.
mondalrinky9:
how 2nd and 3rd option belong to x?
Because they are asking for a prime number that divides 72. And 2 and 3 are the only prime numbers in the options that belong to the the given set.
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in Q.6 you must search for odd no. less than 15
so 2 and 4 is the answer
in q.7
9 divides 72 but its not a prime no.
2 divides 72 and its a prime no
3 is valid in both ways
7 is not divisible
hence 2 and 3 is the answer
so 2 and 4 is the answer
in q.7
9 divides 72 but its not a prime no.
2 divides 72 and its a prime no
3 is valid in both ways
7 is not divisible
hence 2 and 3 is the answer
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