1. 27,16,5,( ),1/7
A.16 B.1 C.0 D.2
2. 2,3,13, 175, ( )
A.30625 B.30651 C.30759 D.30952
参考答案与解析:
1. B【解析】27=3^3,16=4^2,5=5^1,x=6^0, 1/7=7^(-1)
2. B【解析】13=3^2+2×2, 175=13^2+×2, ( )=175^2+13×2 (通过尾数来算,就尾数而言5^2+3×2=1)