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Karan Gupta

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102. Michael Dela Torre Lascuña 37
103. Tanesha Lindsey 37
104. Karan Gupta 36
105. Mark Shanteau 35
106. Watermelon Cat 35
last 3 solved tasks
NUMBERMANIA: Calculate the number 1027 using numbers [9, 1, 3, 4, 90, 939] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
If c9c07 - ca8bb = a3a1 find number abc. Multiple solutions may exist.
NUMBERMANIA: Calculate the number 5031 using numbers [6, 7, 4, 2, 18, 727] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

First U.S. engineering society

In 1851, the first engineering society of importance in the U.S. was incorporated. The Boston Society of Civil Engineers was organized at an informal meeting on 26 Apr 1848, and its first regular meeting was held 3 Jul 1848. Its purpose was "promoting science and instruction in the department of civil engineering." In the following year, the national American Society of Civil Engineers and Architects was founded on 5 Nov 1852 in New York City. Earlier attempts in the U.S. to sustain an engineering society were unsuccessful, including those by the engineers of the Cincinnati & Charleston Railroad in 1836; engineers in Baltimore, Md. in 1839; and a society in Albany, N.Y. in 1841.«*

Train Test

Tom is applying for a job as a signalman for the local railroad and is told to meet the inspector at the signal box.
The inspector decides to give Tom a pop quiz, asking: "What would you do if you realized that two trains were heading towards each other on the same track?"
Tom says: "I would switch one train to another track."
"What if the lever broke?" asks the inspector.
"Then I'd run down to the tracks and use the manual lever down there", answers Tom.
"What if that had been struck by lightning?" challenges the inspector.
"Then," Tom continued, "I'd run back up here and use the phone to call the next signal box."
"What if the phone was busy?"
"In that case," Tom argued, "I'd run to the street level and use the public phone near the station".
"What if that had been vandalized?"
"Oh well," said Tom, "in that case I would run into town and get my Uncle Leo".
This puzzled the inspector, so he asked, "Why would you do that?"
"Because he's never seen a train crash."

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