I am using Firefox 24.0 in Linux Mint. I am currently doing a math test. Incorrect characters are being displayed. There are only true/false questions on this math test. The questions on it are supposed to be very easy basic algebra questions, but because the characters are not loading properly, I cannot tell what they are. A few examples from the test: Are the following statements true or false: |-7|=Ö49=7 Ö8-Ö29=Ö(-21) Ö8-Ö29=-Ö21 3x=6 Þ x=2 (x-2)(x+2) = 1 Þ x-2 = 1 or x+2 = 1 -- Based on how they are being used, I assume Ö should be a √, and that Þ should be a | or ⇒ What is happening here? How do I fix this? Are my guesses correct?