BRAIN TEASERS

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Find the right 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: 3

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Two lawyers

Two lawyers were walking along, negotiating a case.

"Look," said one to the other, "let's be honest with each other."

"Okay, you first," replied the other.

That was the end of the discussion.

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Los Angeles smog

In 1954, a six year research program found that Los Angeles smog was caused by the chemical reaction of sunlight on auto and industrial emissions. The first eye-irritating “smog”in Los Angeles on 26 Jul 1943 - was a “gas attack”of haze, smoke and exhaust that reduced visibility to under three blocks. The Los Angeles Times launched an anti-smog campaign on 1 Dec 1946, and brought a smog expert to Los Angeles to study the problem. On 14 Oct 1947, the L.A. County Board of Supervisors established the nation's first air pollution control program by creating the L.A. County Air Pollution Control District. Dr Haagen-Smit later reported that ozone was the primary nuisance ingredient in smog. London experienced a killer Great Smog on 5 Dec 1952, which resulted in the Clean Air Act of 1956.«[Image: The first recorded photograph of LA smog, 26 July 1943]

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