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Nemanja Katanic

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NUMBERMANIA: Calculate the number 2632 using numbers [7, 5, 1, 1, 29, 326] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Can you count the number of squares in the picture?
MATH PUZZLE: Can you replace the question mark with a number?


In 1967, the first synthesis of biologically active DNA in a test tube was announced at a press conference by Arthur Kornberg who had worked with Mehran Goulian at Stanford and Robert L. Sinsheimer of MIT. Kornberg chose to replicate the relatively simple DNA chain of the Phi X174 virus, which infects bacteria (a bacteriophage). It has a single strand of DNA only about 5500 nucleotide building blocks long, and with about 11 genes, it was easier to purify without breaking it up. Having isolated the Phi X174 DNA, they used the DNA from E. coli, a common bacterium in the human intestine that could copy a DNA template from any organism. The viral DNA template thus copied was found to be able to infect bacteria - it was error-free, active DNA.*

Rubick's Cube

What do Rubick's Cubes and penises have in common?

- The more you play with them, the harder they get.

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