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CBSE Class 10 Answered

sum of even natural numbers
Asked by Harshita Bhola | 08 Nov, 2010, 07:45: PM
answered-by-expert Expert Answer
Dear Student
Even Numbers between 101 and 999 are
102,104,.....998
So its an AP with First term 102 and common difference 2
Now  we need to  find the number of terms
Let there are n terms so
998 = 102+(n-1)2
So 896 = (n-1)2
or n=449
So the sum is given by
449/2(102+998)
=246,950
Regards
Team Topper
So the Sum =
Answered by | 09 Nov, 2010, 10:47: AM

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