Can you replace the question mark with the correct number in the below table sequence?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

You can hear me, but you can't touch or see me.

What am I?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Which flower has two lips?

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

My location can be determined by the below rebus.
So where am i ?