Calculate the number 1309
[925] Calculate the number 1309 - NUMBERMANIA: Calculate the number 1309 using numbers [5, 3, 5, 6, 81, 730] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 31 - The first user who solved this task is Sanja Šabović
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Calculate the number 1309

NUMBERMANIA: Calculate the number 1309 using numbers [5, 3, 5, 6, 81, 730] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 31
The first user who solved this task is Sanja Šabović.
#brainteasers #math #numbermania
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Getting Into Fights

They were married, but since the argument they had a few days earlier, they hadn't been talking to each other.
Instead, they were giving each other written notes.
One evening he gave her a paper where it said:
"Wake me up tomorrow morning at 6 am."
The next morning he woke up and saw that it was 9 o'clock.
Naturally he got very angry, but as he turned around he found a note on his pillow saying:
"Wake up, it's 6 o'clock!"
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Vladimir Nikolayevich Ipatieff

Died 29 Nov 1952 at age 85 (born 21 Nov 1867).Russian-American chemist who was one of the first to investigate high-pressure catalytic reactions of hydrocarbons and who developed a process for manufacturing high-octane gasoline. While studying in Munich (1897) Ipatieff achieved the synthesis of isoprene, the basic unit of the rubber molecule. Upon return to Russia he worked particularly on the use of high-pressure catalysis and of metallic oxides as catalysts. With these techniques, he helped to establish the petrochemical industry in both pre- and post-revolutionary Russia. Before WW I, he had synthesized isooctane, and had polymerized ethylene. After moving to the U.S. (1930), Ipatieff showed how to convert low-octane gasolines into high-octane by 'cracking' hydrocarbons at high temperatures.
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