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: 6

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Appointment With My Cardiologist

I had an appointment with my cardiologist yesterday and on his door it read 8 to 5.
I left immediately!
Why?
I have to have better odds than that.

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U.S. stamps celebrate four scientists

In 2011, four U.S. stamps were issued celebrating American scientists, including Asa Gray, one of America's earliest professional botanists. Three Nobel Prize winners were also shown on a background representing their accomplishment. Melvin Calvin, chemist, studied photosynthesis and also conducted pioneering research on the use of plants as an alternative energy source. Maria Goeppert Mayer developed a theoretical model of the structure of the atomic nucleus. She became the second woman to win a Nobel Prize in Physics. Severo Ochoa, biochemist, worked in protein synthesis, and was the first to synthesize ribonucleic acid (RNA).«

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