So, if folklore holds and you want a bit of the "luck of the Irish," then go hunting for a four-leafed clover, not a shamrock. How Rare Is a Four-Leaf Clover? Four-leaf clovers are a variation on ...
Readers are shown a collection of clover leaves in the image given above. Except for one, which has four leaflets, every leaf has three. In six seconds, can you locate the four-leaf clover?