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Trần Triệu Tân

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279. Adam Saville 7
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last 3 solved tasks
If b9bb7 - b9cbc = ca6 find number abc. Multiple solutions may exist.
In the following circles, the four outer numbers are used to calculate the number in the middle. Can you figure out the rule to determine what number should replace the question mark in the third circle?
How Many Squares Are There?

Johann Georg Gmelin

Died 20 May 1755 at age 45 (born 10 Aug 1709).German explorer, natural scientist and botanist who acted as a natural historian on the imperial scientific expedition led by Friedrich Müller ineastern Siberia (1733-43). From barometric pressure readings, he was first to determine that the shores of the Caspian lay below sea level. In 1735, at the town of Yeniseysk, he recorded a record low temperature. He also detected the permafrost in eastern Siberia, which, a little way below the surface of the ground remained frozen year round. Gmelin spent the period 1747-69 preparing a book recording his finds there. InFlora sibirica sive historia plantorum Sibiriae, he detailed 1,178 species and provided 294 illustrations. His original degree was in medicine (1727), but his fields of study included chemistry, natural resources, geology, zoology, ethnography and geography. He was Leopold Gmelin's great uncle.«

Do you know how the...

“Do you know how the sky was created? It was airborne.”

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