It is 0.
Most schools teach you to always round 5 up (to 1000). However, doing so is inappropriate because it introduces an upward bias. The IEEE (Institute of Electronic and Electrical Engineers) standard 754 is to round 5 up or down so that the new last digit is even. See link for more: //en.wikipedia.org/wiki/Rounding#Round_half_to_even
0
To the nearest thousand, 1000
1000
1000
0
0
500
The answer depends on the degree of rounding.To the nearest unit it is 538To the nearest 20 it is 540To the nearest 1000 it is 1000.
1000
100
0
500