CBSE  /  Class 11  /  Maths  /  Mathematical Reasoning

  • 1. 
    The connective in the statement 2 + 7 > 9 or 2 + 7 < 9 is

  • and
  • or
  • >
  • <

  • 2. 
    Which of the following is not a negation of the statement A natural number is greater than zero

  • A natural number is not greater than zero
  • It is false that a natural number is greater than zero
  • It is false that a natural number is not greater than zero
  • None of these

  • 3. 
    Which of the following is a statement

  • x is a real number
  • Switch of the fan
  • 6 is a natural number
  • Let me go

  • 4. 
    The contra-positive of the statement If a triangle is not equilateral, it is not isosceles is

  • If a triangle is not equilateral, it is not isosceles
  • If a triangle is equilateral, it is not isosceles
  • If a triangle is not equilateral, it is isosceles
  • If a triangle is equilateral, it is isosceles

  • 5. 
    Which of the following is a statement

  • I will go tomorrow
  • She will come today
  • 3 is a prime number
  • Tomorrow is Friday

  • 6. 
    The contra-positive of the statement if p then q is

  • if ~p then q
  • if p then ~q
  • if q then p
  • if ~q then ~p

  • 7. 
    Which of the following is not a statement

  • The product of (-1) and 8 is 8
  • All complex number are real number
  • Today is windy day
  • All of the above

  • 8. 
    If (p or q) is true, then

  • p is true and q is false
  • p is true and q is true
  • p is false and q is true
  • All of the above

  • 9. 
    Which of the following statement is a conjunction

  • Ram and Shyam are friends
  • Both Ram and Shyam are friends
  • Both Ram and Shyam are enemies
  • None of these

  • 10. 
    Which of the following is a compound statement

  • Sun is a star
  • I am a very strong boy
  • There is something wrong in the room
  • 7 is both odd and prime number.
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