MATH PUZZLE: Can you replace...
[4222] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 286 - The first user who solved this task is Thinh Ddh
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 286
The first user who solved this task is Thinh Ddh.
#brainteasers #math #riddles
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Software Development Cycles

Software Development Cycles
1. Programmer produces code he believes is bug-free.
2. Product is tested. 20 bugs are found.
3. Programmer fixes 10 of the bugs and explains to the testing department that the other 10 aren’t really bugs.
4. Testing department finds that five of the fixes didn’t work and discovers 15 new bugs.
5. Repeat three times steps 3 and 4.
6. Due to marketing pressure and an extremely premature product announcement based on overly-optimistic programming schedule, the product is released.
7. Users find 137 new bugs.
8. Original programmer, having cashed his royalty check, is nowhere to be found.
9. Newly-assembled programming team fixes almost all of the 137 bugs, but introduce 456 new ones.
10. Original programmer sends underpaid testing department a postcard from Fiji. Entire testing department quits.
11. Company is bought in a hostile takeover by competitor using profits from their latest release, which had 783 bugs.
12. New CEO is brought in by board of directors. He hires a programmer to redo program from scratch.
13. Programmer produces code he believes is bug-free…
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Tower subway tube railway

In 1870, Tower Subway, the first tube railway in the world, was opened under the River Thames in London, England. Engineer James Henry Greathead used a tunnelling shield he modified from Barlow's design to bore the 6-ft diameter tunnel near the Tower of London. It opened with steam operated lifts and a 12-seat carriage shuttled from end to end by wire rope powered by a steam engine. It was not successful due to low use and frequent breakdowns, and the railway closed within three months (Nov 1870). The tunnel was converted to a foot tunnel with stairs. It was closed in 1894 when the opening of the nearby Tower Bridge made it redundant. The tunnel now holds water mains and fibre optic cables.[Image: structure (1926) built over the northern shaft]
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