Question 47532
1.What is the 
a.smallest 8-digit number?
10,000,000
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b.largest 8-digit even number?
99,999,998
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2.What number is one less than 9,100,000?
9,099,999.
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3.What is the greatest number that would produce 6500 when rounded 
to the nearest hundred?
Assuming that 0,1,2,3,4 are rounded down and 5,6,7,8,9 are rounded up
the answer would be 
6544 if you are rounding down.
6499 if you are rounding up.
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What is the least number that would produce 6500 when rounded to the nearest hundred?
6501 if rounding down.
6445 if rounding up
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How many numbers round to 6500 to the nearest hundred?
previous answer tells you.  But there are two answers depending
on whether you are round up or rounding down.

Cheers,
Stan H.