Rounded to the nearest thousand, 25,730 is 26,000. The rule is that if a number is past the halfway mark at 500 or greater you round up, if it's less round down. Since 730 is greater than 500 you would round up to 26,000.
To the nearest whole number 729, nearest ten it is 730, the nearest hundred it is 700, to the nearest thousand 1000, to the nearest million 0
725 to the nearest tens = 730
730
730
730
730
25 thousand
0
730
25
To the nearest ten, 730
730