What is the hundredths digit of the decimal m?

Let's say \(m=a.bcd\). Hundredths digit would be the value of \(c\). So the question is: \(c=?\)

(1) The tenths digit is 100m is 5 --> \(100m=100*a.bcd=abc.d\) --> tenths digit of \(100z\) is the value of \(d\). So \(d=5\). Not sufficient to calculate \(c\).

(2) The tens digit of 1,000m is 5 --> \(1000m=1000*a.bcd=abcd\) --> tens digit of \(1000m\) is the value of \(c\). So \(c=5\). Sufficient.

Answer: B.

Note: 1234.567

1 - THOUSANDS
2 - HUNDREDS
3 - TENS
4 - UNITS
. - decimal point
5 - TENTHS
6 - HUNDREDTHS
7 - THOUSANDTHS

Hope it helps.
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What is the hundreths digit of the decimal m ?
(1) The tenths digit of 100m is 5.
if we take m = 0.005, thus the tenths digit of 100m is 5
and the hundreths digit of the decimal m is 0
Why is it not sufficient ?
How do you know that the tenths digit must be equal to the hundreths digit ?

thanks
with a.bcd it is much clearer for me

I also missed this one. Nice Refersher on Basic concepts.

Let m be abc.pqr
So we need to get q
statement 1
100m=abcpq.r
tenths digit of 100m => 5
hence r=5
hence insufficient
statement 2
1000m=abcpqr
tens 1000m=q
hence q=5
hence sufficient
Hence B
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