In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 21, 9, 21, 11, 21, 13, . . .What number should come next?
In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces. - 20, 19, 17, x , 10, 5
In following number series, two terms have been put within brackets. Choose the appropriate option - Look at this series: 31, 29, 24, 22, 17, . . . What number should come next?