Yes. Rounding 4,031 to the nearest thousand results in 4,000
4000 has between 1 and 4 significant figures: if it is a rounded number, then it could have been 3999.9, for example, which would be rounded to 4000 to 1, 2, 3 or 4 significant figures.
4000
4000
4000
3500
many numbers could be rounded to 4000 but a example is 3978 rounded to the thousands
To the nearest 4000: 5999
4000
Yes.
4000
4000 has between 1 and 4 significant figures: if it is a rounded number, then it could have been 3999.9, for example, which would be rounded to 4000 to 1, 2, 3 or 4 significant figures.
It is then 4000 when rounded to the nearest thousand
4000
4000
4000
4000
4000