Question

The sum of three numbers in an AP is 9. What is the common difference if the $5^{th}$ term is 35.

• A. 6
• B. 7
• C. 8
• D. 9

Answer 1

The correct option is C

8

Let us suppose the numbers to be a - d, a , a + d. Now, it is given that a - d + a + a + d = 9 , so 3a = 9, a = 3. T₅ = 35 = 3 + 4d , 4d = 32, d = 8.