Girl hasn't replied yet to my text a little over five hours ago?

R3d_Anonymous
I got a girl's number yesterday and texted her, "Hey _______, it's me ______. How's life? How are those quarter grades coming along?" a little over five hours ago. I still have no reply. Does this mean she's not interested? How long should I wait until sending her another text (I know I should wait at least a day, just saying)?

And sorry if this is a bad question. I am a complete noob at texting. This is the first time I got a girl's number in my life.
Girl hasn't replied yet to my text a little over five hours ago?
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