You walk into a phone shop and see a smartphone for £300. That feels like a lot. But then you notice a similar model right next to it for £150. Suddenly, £150 doesn't seem so bad-it almost feels cheap. But wait... if you had only seen the £150 smartphone first, would you still think it was a great deal? Maybe not. Something about seeing that £300 price first changed how your brain looked at the second ... the first number we see as a starting point, even if it doesn't really matter. What's going on in your brain that makes this happen? Take the quiz to find out what's really going on here.