Question

The number of participants at the Singapore Marathon last year was about 65 000 when rounded off to the nearest thousand. What could be the actual number of participants?

Answer 1

It must be greater than 64900..

Answer 2

When rounded off to the nearest thousand, it is 65000.
So we need to find the numbers which will be rounded off to 65000 when they are rounded off to nearest thousands.

The range of number is : 64501 to 65500

The actual number of participants can be any number between 64501 and 65500.
So the number can be 64702, 64521, 65201 etc