36Alternate
Since the first box has 1 number, 2nd has 2 numbers, 3rd has 3 clearly, 200th will have 200
Now,
Total number of terms in the series, 1,2,3,........................
=1 + 2 + 3 + .................. + 200 = 200 x 201 / 2 = 20100
Hence, last term of the 200th box = 20100
Total terms in the series excluding the 200th box = 1 + (20100 - 200 - 1)(1) = 19900
Hence, sum of all the terms including all the boxes = 202015050
sum of all the terms excluding the terms of 200th box = 198014950
Hence, sum of all the terms in the 200th box = 4000100 Ans...