Contradiction with Hebrews 9:4
Exodus 25:11 describes the Ark as overlaid with pure gold, while Hebrews 9:4 describes the Ark as containing the golden pot of manna and Aaron's rod, focusing on different aspects rather than a contradiction in gold itself.
Hebrews 9:4: Which had the golden censer, and the ark of the covenant overlaid round about with gold, wherein [was] the golden pot that had manna, and Aaron's rod that budded, and the tables of the covenant;
Contradiction with Deuteronomy 10:1-3
Exodus 25:11 specifies overlaying the Ark with pure gold, but Deuteronomy 10:1-3 recounts the recrafting of the stone tablets without mentioning gold, though not directly contradicting Exodus.
Deuteronomy 10:1-3: At that time the LORD said unto me, Hew thee two tables of stone like unto the first, and come up unto me into the mount, and make thee an ark of wood.