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Let x = ( 8 3 +13 ) 13 and y = ( 7 2 + 9 ) 9 . If [ t ] denotes the greatest integer  t , then

1. [ x ] is odd but [ y ] is even
2. [ x ] + [ y ] is even
3. [ x ] and [ y ] are both odd
4. [ x ] is even but [ y ] is odd

Correct answer: [ x ] + [ y ] is even

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