Henry Ernest Dudeney/Puzzles and Curious Problems/26 - Cross and Coins

by : $26$

 * Cross and Coins
 * Here is an interesting little puzzle that will probably keep the reader amused for some moments.


 * Take any $11$ of the $12$ current coins of the realm,
 * and using one duplicate coin, can you place the $12$ coins, one in each division of the cross,
 * so that they add up to the same value in the upright and in the horizontal?


 * Dudeney-Puzzles-and-Curious-Problems-26.png


 * To prevent any possible misunderstanding, the $12$ current coins are of the value of $\pounds 1$, $10 \shillings$, $5 \shillings$, $4 \shillings$, $2 \shillings 6 \oldpence$, $2 \shillings$, $1 \shillings$, $6 \oldpence$, $3 \oldpence$, $1 \oldpence$, $\tfrac 1 2 \oldpence$, $\tfrac 1 4 \oldpence$.
 * Now remember, there must be $11$ coins all of different value and only one duplicate.
 * You see, the puzzle is to determine which coin we shall duplicate,
 * and then so to arrange them that both rows shall add up alike when the question arises which coin shall be placed at the crossing to be twice added?