Home Take the quick How Many Hippos? quiz! How many people, on average, are in the air at any moment in time?No, not how many people are jumping up into the air at any one moment, rather how many people are airborne, in planes, on average, right now. 50,000 250,000 500,000 1,250,000 2,500,000 5,000,000 10,000,000 25,000,000 How many fish are there in the sea?If you were to drain all of the oceans of the world and count all of the fish left flapping around in the mud, how many fish would there be? 10 billion (10,000,000,000) 100 billion 200 billion 500 billion 1 trillion (1,000,000,000,000) 10 trillion 100 trillion 1 quadrillion (1,000,000,000,000,000) What is the greatest height a person has fallen from and survived?We all know that it hurts if you trip over a paving slab and slam into the ground, and that is just a fall of a couple of feet. How far could someone have fallen onto the ground (and not onto water) and lived? Oh, and obviously they didn’t have a parachute or any other form of protection (and they didn’t land in a safety net, airbag or other such device). 50 metres (164 feet) 100 metres (328 feet) 300 metres (1,000 feet) 1,500 metres (5,000 feet) 3,000 metres (10,000 feet) 5,000 metres (16,400 feet) 7,000 metres (23,000 feet) 10,000 metres (32,800 feet) How many eyelashes does the average person have?If you counted the number of eyelashes on the lower lid of the left eye of an average person and then the upper lid, and then did the same for the right eye, and then added them all together, what result would you get? 120 240 360 480 600 720 840 960 How many transistors are there in an iPhone 11?Most of us carry a small slab of highly condensed technology around in our pockets, but just how condensed is it? How many transistors are there in an iPhone 11? 10 million 50 million 100 million 500 million 1 billion 5 billion 7.5 billion 10 billion Click here if you'd like to receive our occasional newsletterKeep up-to-date with our latest fun projects and offers. We won't share your address with anyone else, and you can unsubscribe at any time. Yes please, keep me informed! Your email address* Enter Email Confirm Email ConsentWe won't share your address with anyone else, and you can unsubscribe at any time. I agree to my email address being stored.