Contradiction with Mark 2:27
Numbers 28:25 mandates a specific day of rest, whereas Mark 2:27 suggests that the Sabbath was made for man's benefit and flexibility, which might seem contradictory to strict observance.
Mark 2:27: And he said unto them, The sabbath was made for man, and not man for the sabbath:
Contradiction with Colossians 2:16-17
While Numbers 28:25 emphasizes adhering to holy convocations, Colossians 2:16-17 indicates that such ritual observances are a shadow of things to come, suggesting they are no longer necessary.
Colossians 2:16-17: Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath [days]: [in meat...: or, for eating and drinking] [respect: or, part]
Contradiction with Romans 14:5
Numbers 28:25 prescribes specific days of observance, but Romans 14:5 promotes personal conviction in observing special days, implying a more relaxed view.
Romans 14:5: One man esteemeth one day above another: another esteemeth every day [alike]. Let every man be fully persuaded in his own mind. [fully persuaded: or, fully assured]
Contradiction with Galatians 4:9-10
Numbers 28:25 insists on regulations for holy days, whereas Galatians 4:9-10 questions the necessity of observing such days from a bondage perspective.
Galatians 4:9-10: But now, after that ye have known God, or rather are known of God, how turn ye again to the weak and beggarly elements, whereunto ye desire again to be in bondage? [turn ye again: or, turn ye back] [elements: or, rudiments]
Paradox #1
Numbers 28:25 deals with religious observances and sacrifices. A potential contradiction or inconsistency might be seen when comparing these Old Testament requirements with the New Testament's teachings, where the necessity for sacrifices is dismissed through the idea of grace and forgiveness given by Christ's sacrifice. This could be seen as conflicting with the earlier mandate for ritual and sacrifice.