Which one is correct? “please let me know if you have any question” or ”please let me know if you have any questions”

What causes people to judge a person by the way they look?

How much equity should I get as CTO?

How does one ejaculate without achieving orgasm?

What is the need of a president in a country like India?

What are some of the best new camping inventions?

Why are Indians obsessed with God and religion?

What is a Marketing Director?

How can I improve my c programming skills?

What is e-construction?

What are some funny classic Bollywood songs?

What is the district of Edgware and how does the lifestyle compare to the London Borough of Islington?

What is are the best jobs in the Philippines?

What are some examples of friction in everyday life?

What are the best institutes to study a big data course in Hyderabad?

What is a safe way to lose 40 pounds in 5 weeks?

Which option should I choose for MBA: TERI or ISBR?

What are some movies you can’t go your whole life without seeing?

What does each line mean from the song STARBOY by Weeknd ?

How many times will you have sex in a day?