What has 13 hearts but no other organs?

What is the next number in this series?

4,12,84,3612....

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

Which tank will fill first?

Can you find the missing piece of the Porsche?

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.

What month of the year has 28 days?