BRAIN TEASERS

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What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 30

The first user who solved this task is Nasrin 24 T.

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Single vs. Married

Why are single women thinner than married women?

Single women come home, look in their refrigerator, and go to bed.

Married women come home, look in their bed, then go to the refrigerator!

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Alkali Works Act pollution control

In 1863, the Alkali Works Act was passed in Britain, effective 1 Jan 1864, to limit the extensive environmental damage caused by atmospheric pollution from industrial alkali works in the English counties of Lancashire and Cheshire. The Act successfully enforced “the more effectual condensation of muriatic acid gas” (hydrochloric acid, HCl). In the era before electrolysis, alkali was manufactured by reacting salt with sulphuric acid, which produced HCl gas as an unwanted byproduct, released from tall chimneys intended to disperse the noxious vapours by dilution over a wide area. So this severely damaged the vegetation in a wide area. Buildings and iron structures were corroded. In the 1840s in the Merseyside area alone, an estimated 60,000 tons of the pollutant was released. The Act required a 95% reduction.«

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