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Which of the following is a null set? {...

Which of the following is a null set?
`{x:x in Z and (-1)/(2) lt x lt (9)/(2)}`
`{x:x in N andx-4 le 15}`
`{x:x in N, xlt 5 and x gt 8}`
`{x:x in N and x^(2) lt 40}`

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The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-SETS -SECTION-A(Objective Type Questions (One option is correct))
  1. The set of the counting numbers which are multiple of 6 and less than ...

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  2. If A is the set of days in a week, then set A is

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  3. Which of the following is a null set? {x:x in Z and (-1)/(2) lt x lt...

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  4. Let A={x:x is a positive multiple of 2 less than 20 , x in N} then n(A...

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  5. If P={x:x is a prime number is less than 20} and M={x:x is a multiple ...

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  6. If A={1,2,3} then the number of elements in P(A) is

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  7. If A={x,y} then power set of A is

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  8. Which of the following represents pair of equal sets?

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  9. If A={1,2,3}, B={4,5,6},C={1,2,3,9,6} then which of the following is n...

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  10. If A subset B , B subset C then

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  11. If P(A)=P(B) then

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  12. Which of the following is true?

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  13. The intervals of the set {x:x in R and -3 lt le 15} is

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  14. The intervals (2,7) can be represented by the

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  15. Which of the follwing represent power set of (0,3)?

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  16. If M={3,6,9,18,27} and N={1,3,9,27} then M cup N is

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  17. The pair of disjoint sets are

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  18. Let A be the sets of the letters in the world "RAIGARH" and B be the s...

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  19. If D={x:x is divisible by 2 and 3 and 0 lt x lt 20} and B={x:x is a mu...

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  20. The shaded area in given Venn diagram represent

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