 
<translate> Bambanci tsakanin kalmomi biyu masu biye daga farkon su ne 7, 5, 7, 5, 7, 5. Saboda haka, 40 ba daidai ba ne. Amsar karshe: (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). 