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

Look at this series: 1000, 200, 40, . . . What number should come next?

** Option:**

**A.**8

**B.**10

**C.**15

**D.**20

**Answer: A . 8**

** Justification:**

This is a simple division series.

Each number is divided by 5.

Rule = (1st number / 5 = 2nd number) (2nd number / 5 = 3rd number)....

Now, (1000 / 5 = 200), (200 / 5 = 40), (40 / 5 = 8)...

So answer is **a = 8.**