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UPSC CDS Math Number System Questions

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Question : 69

Total: 102

Let x and y be positive integers such that x is prime and y is composite.Which of the following statements are correct ?
1. (y-x) can be an even integer.
2. xy can be an even integer.
3. 0.5(x+y) can be an even integer.
Select the correct answer using the code given below:

1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3

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