Find the sum of all natural no between 650to 1000 which is excatly divisible by 7
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the series will be in A.P
651,658,665...........987,994
a=651. ; d=7
994= 651+(n-1) 7
n= 50
sum will be ;
=50/2(651+994)
=25501
651,658,665...........987,994
a=651. ; d=7
994= 651+(n-1) 7
n= 50
sum will be ;
=50/2(651+994)
=25501
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