95,88,71,61,50,( ) A.40 B.39 C.38 D.37
问题描述:
95,88,71,61,50,( ) A.40 B.39 C.38 D.37
答
A因为:81+9+5=95,72 + 8+ 8 = 88,63 + 7 + 1 = 71,54 +6 + 1 = 61,45+5+0 =50,36+4+0 =40 有因为:81=9*9,8*9=72,7* 9=63,6*9=54,5*9=45,4*9=36 故,其规律为:9*(10-n)+该项的十位数+该项的个位数.所以选A...