-) Find the sum of all numbers from 150 to 200 which are divisible by 8
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1 thought on “-) Find the sum of all numbers from 150 to 200 which are divisible by 8<br />​”

1. Answer:

   152,160,168,—————200

   a= 152

   d = 8

   an =200

   an = a+(n-1)d

   200 = 152+(n-1)8

   48= (n-1)8

   6 = (n-1)

   n = 7

   s7 = 7/2 (304+(6)8)

   s7 = 7/2 (304+48)

   s7 = 7/2 ×352

   s7= 7×176

   s7 = 1232

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