Hinduism is widely considered the oldest religion in the world. There's evidence from thousands and thousands of years ago of funerary rituals and statuary being buried with the dead, but the meanings behind all of that have been lost. Hinduism is generally the most organized form of religion that has survived and is understandable for you and me. What do you know about Hinduism that wasn't taught to you by Apu, assuming you're not a Hindu yourself? It's safe to say you probably only have a passing familiarity with it.
Because Hinduism is actually a large number of beliefs and traditions that are all tossed together, it seems a little complex, but for the purposes of understanding the meaning of life, you need to know only a few key points: Hinduism, the oldest major religion humanity has, is concerned with the knowledge of truth and reality, moral order, and right actions. In so many words, a good Hindu is someone who does right and seeks the truth. He is tolerant of others and acts in a good way. Sound familiar? It's pretty much every major religion ever.
"We all copied off the same guy's test."
How did it come to pass that, as a basic tenet of Christianity, we are supposed to love our neighbors as we love ourselves? And those who follow the Muslim faith are to pardon and forgive others, for Allah loves those who do good to others? All major religions that people adhere to en masse have the same message, because it's a good one: do good, be good, and everything is good. Only an idiot would argue with that, right? This is the point where you ignore our history of religious intolerance and bigotry and agree that, fundamentally, every human who is "normal" believes the same thing. Theists, atheists, and agnostics likely all believe or will pay lip service to the ideal that we should treat each other as we want to be treated. We should be nice and not harm or steal from one another. In fact, I will argue that you can't reasonably, rationally propose another method of existence. No sane person could do so with sincerity, because to propose a world in which it is OK to harm some, to kill some, to steal from some, is to readily accept that you are OK with being harmed and killed yourself, for any arbitrary reason, and I believe no one who is rational would ever accept that. So it's wrong.