Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

What word begins and ends with an E, but has only one letter?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Why is the longest human nose just 11 inches?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What demands an answer, but asks no questions

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

What English word has three consecutive double letters?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.