How many 6’s are there in the following sequence which are followed by 3 and preceded by 8?
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1. Studying a material at a stretch is know as
2. Which of the following data structures can be used to efficiently implement a priority queue ?
3. Serious health concerns in modem America are related to (1) (2) (3) (4)
7. Chemical name of common salt is
8. hcf of $\frac{8}{9}$ and $\frac{20}{27}$ is
9. The sum of the series $1+\frac{3}{1!}+\frac{5}{2!}+\frac{7}{3!}+...\infty$ is :