Gen 5:25 And Methuselah lived an hundred eighty and seven years, and begat Lamech
Gen 5:28 And Lamech lived an hundred eighty and two years, and begat a son:
29 And he called his name Noah,
If we add 187 yrs,age of Methuselah at Lamech;s birth and 182 yrs the age of Lamech at Noah’s birth, we get how much older Methuselah was than Noah. which adds up to 369 yrs.
Gen 7:6 And Noah [was] six hundred years old when the flood of waters was upon the earth.
If we add the age of Noah during the flood, which was 600 yrs to the age difference of Methuselah, and Noah which was 369 yrs, we get the age of Methuselah at the time of the flood which was 969 yrs, which was the age of Methuselah at death.
Gen 5:27 And all the days of Methuselah were nine hundred sixty and nine years: and he died.
Question; Did Methuselah die in the flood?