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Within two weeks of its February 2007 launch, how many users had Tumblr gained?
Answer
75,000
What was the name of David Karp's software consulting company where Tumblr development began?
Answer
Davidville
Which developer worked with David Karp on Tumblr before later leaving for Instapaper?
Answer
Marco Arment
What hybrid sports car did Ferrari produce as its first production car with KERS-derived HY-KERS technology?
Answer
LaFerrari
What braking technology lets modern hybrid cars recover energy while slowing down?
Answer
Regenerative braking
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Latest trivia questions
What braking technology lets modern hybrid cars recover energy while slowing down?
Answer
Regenerative braking
Which Chicago company produced the early Dual Power hybrid car?
Answer
Woods Motor Vehicle Company
Who designed the Lohner-Porsche vehicles that included the first hybrid electric vehicle?
Answer
Ferdinand Porsche
Which Honda hybrid was the company's third hybrid model after the Insight and Civic Hybrid?
Answer
Honda Accord Hybrid
Which Lexus model was the first mass-production rear-wheel-drive luxury hybrid car?
Answer
Lexus GS 450h
The Cadillac ELR was derived from which Cadillac concept car?
Answer
Cadillac Converj
Which Peugeot model was the world's first mass-production diesel-electric hybrid?
Answer
Peugeot 3008 HYbrid4