6500 to 7499 -- 1000 numbers
When rounding off, the rule is, "If the first figure to be discarded is 5 or more then the previous figure is increased by 1. Following this rule then 650 is the result of rounding off numbers in the range 645 to 654. As 650 itself is not rounded off then there are 9 whole numbers that can be rounded to 650.
500
It depends on whether you are rounding to the nearest integer, nearest 10, nearest 50 etc.
600 of them. Any number from 300 tp 899 (inclusive), to the nearest 600.
2545 to 2554
Ten of them.
There are 0.3048 metres in one foot. Therefore, rounded to two decimal places, 2550 metres is equal to 2550/0.3048 = 8366.14 feet.
999 of them.
999 of them.
Nine of them.
99 of them.
6500 to 7499 -- 1000 numbers
0
Ten whole numbers can be rounded to 30. The numbers are 25, 26, 27, 28, 29, 30, 31, 32, 33 and 34. There are an infinite number of complex numbers in the interval [25,35) that can be rounded to 30.
3 and these are 600,650,and 700
1000 numbers. From 19,500 to 20,499 all round to 20,000