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Find number abc

If 9b80a - 90ac7 = bbbb find number abc. Multiple solutions may exist.

Correct answers: 9

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Senior Citizen

A man visits his psychiatrist and talks about being haunted by visions of his departed relatives. He says; these ghosts are perched on the tops of fence posts around my garden every night. They sit there and watch me and watch me. What can I do?

The psychiatrist says; that's easy … just sharpen the tops of the posts.

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Robert Remak

Died 29 Aug 1865 at age 50 (born 30 Jul 1815). Polish-German physician, neurologist and embryologist. While in medical practice, he researched unpaid at university. (As a Jew, he was barred from teaching.) He discovered the fibres of Remak (1830), nonmedullated nerve fibres (1838), and named the three germ layers he discovered of the early embryo: the ectoderm, the mesoderm, and the endoderm (1842). In 1844 he discovered the nerve cells in the heart now called Remak's ganglia and provided the first illustration of the 6-layered cortex. He was a pioneer in the use of electrotherapy for the treatment of nervous diseases. He finally became the first Jew to teach at university (1847), but even promotion to assistant professor in 1859 did not reflect his eminence.DSB give date of birth 30 Jul 1815. EB gives 26 Jul 1815.]

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