Find the sum of all even number between 270 and 345
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Summ of all even numbers from 270 to 345 is 11666
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apply A.P.
272,274,276...........344
no.of terms
344=a+(n-1)d
a=272
d=2
344=272+(n-1)2
344-272/2=n-1
36+1=n
n=37
sum=n/2 (a+l)
sum=37/2 (272+344)
=18.5 (616)
=11396
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