If you're smart, then it's 19.
If you stupid, then it's 21!
Very funny.
An irrational number (it never ends.) 3.141529265359 and so on.
34/100+5/10=
34/100+50/100=
84/100=
21/25.
No, it's a math website. Look at the name: Web 2.0 Calculator. Mindblown.
Oh yeah! Before I forget, mine is blue!
Letters or symbols that take the place of numbers.
Example: x+1=3
x=2 because 2+1=3.
Um... 1?
You can't simplify 3/4 any further.
+99 
