Maths and Procrastination

I don't know about you but somehow when I don't get a question or I don't know how to do a particular equation or whatever, I feel really sleepy...
Like now, I'm struggling with simulatanous equation because however many times I attempt it, I can never quite get the answer so that is why I'm choosing to procrastinate and update my blog. Of course, this sounds really bad of me but I simply can't help it. I SHOULD be studying for the maths test on Tuesday and I'm really stressed because apparently my class is already really behind in the work but I can't help but do other stuff which I COULD do after the maths test...