Don't worry, Quant. section in GRE is so easy and enough practice is necessary on simple concepts. Nova math bible, Manhattan series and other books can help you pretty much. Just google them, many are available for free. For verbal section, practice vocabulary and reading comprehensions.Recently, I came across this quiz available for free on GRE word lists, I hope this helps you in your preparation.
link for the quiz is:
udaysagar2177.byethost14.com/vocabTest
All the best!
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