I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

During which month do people sleep the least?

What you cannot hold but it is yours?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?