Answer
6580
6600
7000
Work Step by Step
6583 ( For nearest ten we need to check 6580 & 6590)
As 6580 is more near then 6590 to 6583
Nearest Ten is 6580
6583 ( For nearest hundred we need to check 6500 & 6600)
As 6600 is more near then 6500 to 6583
Nearest Hundred is 6600
6583 ( For nearest thousand we need to check 6000 & 7000)
As 7000 is more near then 6000 to 6583
Nearest Thousand is 7000