There are 4 jars, placed upside down on a table. Each jar has an identical number of pebbles and a sticker placed on top as a clue which helps us identify the number of marbles in the jars. The stickers placed on the jars are as follows: Two or Three, One or Four, Three or One, One or Two
Only one out of these numbers is correct and that represents the numbers of pebbles in the jars. How many pebbles are there in the jars?