In following number series, two terms have been put within brackets. Choose the appropriate option

20 20 17 17 14 14 11What numbers should come next ?

** Option:**

**A.**8 8

**B.**11 11

**C.**11 14

**D.**8 9

**E.**11 8

**Answer: E . 11 8**

** Justification:**

This is a simple subtraction with repetition series.

It begins with 20, which is repeated, then 3 is subtracted, resulting in 17, which is repeated, and so on.

Rule = (1st no) (1st no) (1st no - 3 = 2nd no) (2nd no repeat) (2nd no - 3 = 3rd no) (3rd no repeat). . .

Now (20) (20) (20 - 3 = 17) (17) (17 - 3 = 14) (14) (14 - 3 = 11) (11) (11 - 3 = 8) (8)

So the answer is **e = 11 8.**