The largest 4 digit number that can be rounded off to 3000 is 3499.
If 3499 is rounded to nearest thousand then we get 3000 but if we consider a number greater than 3499 then rounding off yields 4000.
So, 3499 is the required number.
Since numbers equal to or greater than 5 are rounded up, and numbers equal to or less than 4 are rounded down, the largest 4-digit number that can be rounded off to 3000 would be 3004.
2911 rounded to 1 significant figure is 3000.
3000
3499
3000
3000
If you include the number 3,000, there are exactly 2,001 4-digit numbers between 500 and 3000.
3000
3000
3,000
3000
3000