Inventions

Which of these messengers has the biggest number of active users in the world?

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Answer explanation

As of 2021, WhatsApp is the messenger with the biggest number of active users in the world, with over 2 billion monthly active users.

PDF is, unsurprisingly, an acronym. Name any of the three words represented by PDF.

• Public Document Format

• Printable Data Form

• Portable Document Format

• Personal Document File

What color do you get if you mix together the two colors that appear twice in the Google logo?

• Orange

• Blue

• Green

• Purple

Answer explanation

Blue + red = purple

Now appearing prophetic, what device was announced in 2007 with the following slogan? "This is only the beginning."

• iPhone

• iPod Touch

• Apple Watch

• 1. Apple TV

Answer explanation

Jobs was referring to the fact that the iPhone was not just a new phone, but a revolutionary device that would change the way people interact with technology, and would pave the way for a new era of mobile computing.

What is this device used for?

• Taking a walk with your pets

• Unscrewing the lids

• Catching snakes

• Warming up food

Answer explanation

What brand founder is considered the creator of the first modern jeans?

• Levi's

• Wrangler

• Lee

• Gucci

What did Albert Parkhouse invent that is one of the most stolen items from hotels?

• Coat hanger

• Shower cap

• Television remote control

• Bathrobe

Answer explanation

Back in 1981, compact discs were set to revolutionise the music industry. Kieran Prendiville demonstrated their durability by doing what?

• Spreading jam on it

• Jumping up and down on it

• Writing on it with a pen

• Scratching it with a stone

Answer explanation

CDs may have been rather less unbreakable than the hype suggested, but you would never treat a vinyl record like that.

What innovative radio company developed the Music Genome Project to classify music by mirroring mathematical techniques for gene sequencing within human DNA? The company is named after the first human woman created by the gods in Greek mythology.

• Pandora

• Medusa

• Eve

• Ariadne

Which American tech company started with its founders' idea to rent out an air mattress in their San Fransisco living room to travelers hoping to avoid the city's high cost of rent?

Answer explanation