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H Harsh Kankaria
The given statement in the form “if-then” is : (iv) If you get A+ in the class, then you have done all the exercises in the book.

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H Harsh Kankaria
The given statement in the form “if-then” is : If diagonals of a quadrilateral bisect each other, then it is a parallelogram.  

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H Harsh Kankaria
The given statement in the form “if-then” is : If the Banana tree stays warm for a month, then it will bloom.   

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H Harsh Kankaria
The given statement in the form “if-then” is : If you get a job, then your credentials are good.  

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H Harsh Kankaria
First, we convert the given sentence into the "if-then" statement: If x is an even number, then x is divisible by 4. The contrapositive is: If x is not divisible by 4, then x is not an even number. The converse is: If x is divisible by 4, then x is an even number.

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H Harsh Kankaria
The contrapositive is: If you know how to reason deductively, then you can comprehend geometry. The converse is: If you do not know how to reason deductively, then you cannot comprehend geometry.  

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H Harsh Kankaria
The contrapositive is: If something is not at low temperature, then it is not cold. The converse is: If something is at low temperature, then it is cold .  

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H Harsh Kankaria
The contrapositive is:  If two lines intersect in the same plane, then they are not parallel. The converse is: If two lines do not intersect in the same plane, then they are parallel.  

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H Harsh Kankaria
The contrapositive is : If a number x is not odd, then x is not a prime number. The converse is : If a number x in odd, then it is a prime number.  

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H Harsh Kankaria
a.) If the square of a natural number is odd, then the natural number is odd. b.) A natural number is not odd only if its square is not odd. c.) For a natural number to be odd it is necessary that its square is odd. d.) For the square of a natural number to be odd, it is sufficient that the number is odd e.) If the square of a natural number is not odd, then the natural number is not odd.
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