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?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Replace the question mark with the correct number.

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

In which direction should the missing arrow point?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

Why do people go to bed?

What breaks yet never falls, and what falls yet never breaks?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?