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Find number abc

If 9bc5a + 2b92b = 11ab80 find number abc. Multiple solutions may exist.

Correct answers: 0

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Christmas Knock, knock joke

Knock, knock

Who’s there?

Merry.

Merry who?

Merry Christmas!

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Synthetic quinine

In 1944, the first synthetic quinine was produced by Dr. Robert Burns Woodward (on his birthday) and Dr. William von Eggers Doering at the Converse Memorial Laboratory, Harvard University, Cambridge, Mass. Quinine, an anti-malarial drug, is an organic chemical with the formula C20H24N2O2.

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