From The Creation Answer Book:
Did Noah take seven pairs or two pairs of animals with him on the ark?
Does it seem reasonable to suppose an author capable of writing a masterpiece such as the book of Genesis would get confused within the span of several sentences?
“Go into the ark, you and your whole family, because I have found you righteous in this generation. Take with you seven pairs of every kind of clean animal, a male and its mate, and one pair of every kind of unclean animal, a male and its mate, and also seven pairs of every kind of bird, male and female, to keep their various kinds alive throughout the earth. Seven days from now I will send rain on the earth for forty days and forty nights, and I will wipe from the face of the earth every living creature I have made” (Gen 7: 1-4).