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?
Answer: A. 8
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.