find the sum of all multiples od 7 lying between 100 and 1000
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105+112+117+......+994
These are 127 terms
Sum of 127 terms=127/2(105+994)
=127/2(1099)=69786.5
These are 127 terms
Sum of 127 terms=127/2(105+994)
=127/2(1099)=69786.5
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