In following number series, two terms have been put within brackets. Choose the appropriate option - In the series 7, 14, 28, ..., what will be the 10th term ?
How many 7's are there in the following series which are preceded by 6 which is not preceded by 8 ? 8 7 6 7 8 6 7 5 6 7 9 7 6 1 6 7 7 6 8 8 6 9 7 6 8 7