What has 13 hearts but no other organs?

Solve the equation in the image by looking at the pattern closely.

Replace the question mark with the correct number.

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

Spot what is wrong here in below Picture?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?