Question

find the sum of first hundred even natural number which are divisible by 5

Answer 1

Hey user,

 The numbers are 0,5,10,15...and so on are natural nos
Even natural numbers will be 0,10,20...and so on
Since they are in AP with Common difference=10
So 
Sum=100/2(99*10)=49500

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Answer 2

Hey mate,

By applying the Sn formula

We are sure to get the answer as

50500