# Puzzles, situation puzzles and recreational mathematics.

## Neuron juice.

The important thing is not to stop questioning. (Albert Einstein.)

#### riddle.

8.- The problem is basically the same as the previous 12 coins, just do not know if the false coin weighs more or less, and still have only three weighed on a scale.

The question is what is the counterfeit money and if you weigh more or less than others

#### Solution

 1 < 1-2-3-4 >°< 5-6-7-8 > A+ Igual. B+ 2 < 1-2-5-6 >°< 7-9-10-11 > < 9-10 >°< 11-1 > < 1-2-5-6 >°< 7-9-10-11 > A+ Igual. B+ A+ Igual. B+ A+ Igual. B+ 3 < 1 >°< 2 > < 3 >°< 4 > < 5 >°< 6 > < 9 >°< 10 > < 12 >°< 1 > < 9 >°< 10 > < 5 >°< 6 > < 3 >°< 4 > < 1 >°< 2 > A+ -> 1+ = ---> 7- B+ -> 2+ A+ -> 3+ = ---> 8- B+ -> 4+ A+ -> 6- = ---> B+ -> 5- A+ -> 9+ = ---> 11- B+ -> 10+ A+ -> 12+ = ---> B+ -> 12- A+ -> 10- = ---> 11+ B+ -> 9- A+ -> 5+ = ---> B+ -> 6+ A+ -> 4- = ---> 8+ B+ -> 3- A+ -> 2- = ---> 7+ B+ -> 1-

 = balanced scale. % unbalanced balance. A+ heavier left pan. B+ heavier right dish. As you can see the second and third weighing are the same in the event that the balance lean to one side or another , is separated to clarify the explanation.