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reminder of remainder

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reminder of remainder

by sanju09 » Tue Nov 10, 2009 1:31 am
How many 3 digit positive integers exist that when divided by 7 leave a remainder of 5?
A. 128
B. 142
C. 143
D. 141
E. 129
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by papgust » Tue Nov 10, 2009 2:32 am
Possible integers range from 103 to 999.
First term=103, Last Term=999, Difference=7

999=103+(n-1)*7
n=129 (Answer)
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