With time it can happen you have a bunch of installed apps on your Windows Phone 8 powered phone you never use anymore, I suggest you to remove them to free some of the storage.
If you were or still are a fan of video and computer games then this basic quiz shouldn't be much of a challenge. And don't forget you build up your Dreevoo knowledge profile by going through this short tests.
I bet at some point you were wondering how much gold is there in the world. I know I have. See these mind-blowing 3D visualizations of gold compared to everyday objects to get a better perception.