 
<translate> Ọdịiche dị n'etiti okwu abụọ na-esote site na mmalite bụ 7, 5, 7, 5, 7, 5. N'ihi ya, 40 adịghị mma. Azịza ikpeazụ: (C). <eng> The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5. So, 40 is wrong. Final answer: (C). 