24999
1499
0
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.
20000
9797 is the largest two digit prime number.
20499
24,999
The largest five-digit number that can be rounded off to 20,000 is 20,499. When rounded to the nearest thousand, any number from 19,500 to 20,499 will round to 20,000. Therefore, 20,499 is the maximum five-digit number that still rounds down to 20,000.
15000
84999
14
14
1499
0
0
89 rounds to 90
14. 15 would be rounded to 20.