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Calculate the number 3398

NUMBERMANIA: Calculate the number 3398 using numbers [2, 6, 5, 7, 26, 573] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

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A male ostrich was chasing two...

A male ostrich was chasing two female ostriches. The one female said to the other, "He's starting to gain on us, we better hide!" So, they stopped and stuck their heads in the sand.
The male ostrich said, "...Hey, where'd they go?"

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Odd Hassel

Born 17 May 1897; died 11 May 1981 at age 83.Norwegian physical chemist who shared (with Sir Derek H.R. Barton of Great Britain) the 1969 Nobel Prize for Chemistry for his work in establishing conformational analysis (the study of the 3-D geometric structure of molecules). A ring of six carbon atoms has two conformations - the chair and boat forms. These easily interchange - about a million times in a second at room temperature. One of the conformations is, however, strongly predominant (about 99%). Hassel carried out fundamental investigations on this system and showed how heavy or bulky groups, attached to the carbon atoms, take up their positions relative to the ring and to each other. Such work is of great importance for predicting the mode of reaction of a certain molecule.

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