Q5 of 23 Page 1

Attempt any two subquestions from the following:

Find the sum of all numbers from 50 to 350 which are divisible by 4. Also find 15th term.

Given: numbers

The series will be :


52, 56, 60 …. 348


Tn = a + (n-1)d


348 = 52 + (n-1)4


348-52 = 4n -4


4n = 296 + 4


4n = 300


n = 75


now, t15 = a + (n-1)d


= 52 + (15-1)4


= 52 + 56


= 108


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