1.4,5,15,6,7,35,8,9,( )A.27 B.15 C.72 D.632.1526,4769,2154,5397A.2317 B.1545 C.1469 D.5213
问题描述:
1.4,5,15,6,7,35,8,9,( )
A.27 B.15 C.72 D.63
2.1526,4769,2154,5397
A.2317 B.1545 C.1469 D.5213
答
第一个C
答
D.C 4*5-5. 8*9-9 选D。
2-1=1 6-5=1 6-4=2 9-7=2 5-2=3 4-1=3.6-1=5 9-4=5 选C
答
1.4,5,15,6,7,35,8,9,( D )A.27 B.15 C.72 D.63规律:每三个数一组(4-1)×5=15(6-1)×7=35所以8,9后面的数是:(8-1)×9=63、选( D )2.1526,4769,2154,5397,( C )A.2317 B.1545 C.1469 D.5213 已知的...