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The problem of jelly beans

In the gang of my neighborhood we are as many boys as girls and we all love jelly beans. Today my friend Andrea has found 7 cents under the bank where we met and has decided to share them with the whole gang, so we have gone to the jelly beans store in front. In the store there are three types of goodies.
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In detail

The ferry problem

The following enigma was proposed by the fantastic Sam Loyd in his puzzle encyclopedia. Two ships depart from the opposite banks of a river at the same time and are located 720 yards from the port. Once they reach the opposite end of the river, they make a 10-minute stop and on the return trip they are 400 yards from the other port.
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Information

Mars channels

Here is a map of the recently discovered cities and canals of our nearest neighboring planet, Mars. Start in the city marked with an N, at the south pole, and see if you can spell a complete sentence by touring all the cities, visiting them only once and returning to the starting point.
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Columns that disappear

Look at this image of an arch with two square columns at its ends. Or maybe it's three round columns? Certainly, the author plays with perspective and builds an impossible monument by turning square columns into round ones. Look at this other image that performs the same effect.
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Articles

Foot Reflexology, indications and contraindications

Reflexology, reflexotherapy or zonal therapy is the practice of stimulating points on the feet, hands, nose or ears (called "reflex zones"), based on the pseudoscientific belief that this massage would have a beneficial effect on an organ located in another body place. Foot reflexology is an applied pressure therapy that involves the stimulation of the reflex points found in the foot.
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In detail

In the living room

Look at this picture where a beautiful family appears in the living room of his house, how can people walk over without falling inside? Solution But in reality it is the floor of a station. Another 3D optical illusion.
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