**Question:**

Which term of the series 5, 8, 11, 14,...is 320?

**Option A):**

105th**Option B):**

104th**Option C):**

64th**Option D):**

106th

**Correct Answer is Option D):**

106th

**Explanation:**

Clearly, 5+3 = 8, 8+3 = 11, 11+3 =l4 So, the series is an A.P. in which a = 5 and d = 3. Let the number of terms be n. Then 320 = 5+(n-1)x3 or (n- 1) = 105 or n= 106.