How many $3$'s are there in the following sequence which are neither preceded by $6$ nor immediately followed by $9$?
$9, 3, 6, 6, 3, 9, 5, 9, 3, 7, 8, 9, 1, 3, 9, 6, 3, 9$

Saiyeev ranks seventh from the top and twenty-eighth from the bottom in a class. How many students are there in the class?

The train for Lucknow leaves every two and a half hours from New Delhi Railway Station. An announcement was made at the station that the train for Lucknow had left $40 \,minutes$ ago and the next train will leave at $18:00 \,hrs.$ At what time was the announcement made?

In a row of $16$ boys,when Pramod was shifted by two places towards the left,he became $7^{th}$ from the left end. What was his earlier position from the right end of the row (in $^{th}$)?

In the series,$6, 4, 1, 2, 2, 8, 7, 4, 2, 1, 5, 3, 8, 6, 2, 1, 7, 1, 4, 1, 3, 2, 8, 6$,how many pairs of successive numbers have a difference of $2$ each?

If $16 \times 85 = 8651$,what is $73 \times 42$?