 
<translate> Nchịkọta nke nọmba iri na atọ niile = 13 * 58 = 754 Nchịkọta nke asaa mbụ n'ime ha = 7 * 57 = 399 Nchikota nke 7 ikpeazụ n'ime ha = 7 * 61 = 427 Ya mere, ọnụọgụ nke asatọ = 427 + 399 - 754 = 72. N'ihi ya, azịza ya bụ (A). <eng> Sum of all the 13 numbers = 13 * 58 = 754
Sum of the first 7 of them = 7 * 57 = 399
Sum of the last 7 of them = 7 * 61 = 427
So, the 8th number = 427 + 399 - 754 = 72.
Therefore, the answer is (A). 