Moses was eighty years old at the time, the year 2448 after creation. Moses passed on in 2488 on the seventh of Adar at the age of 120.
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Moses was at the end of his 80th year when he went to Pharaoh -- meaning he was still 79 years old at that time.
As per my knowledge, in Parshas Va'eira, it says that Moses was 80 yers old at the time when he went to speak to Pharaoh! How is it possible then, that Moses was 80 years old at the time of the giving of the Torah?????