一,For all positive integers m(m都有一方框围着),m=3m when m is odd and m=1/2m when m is even. Which of the following is equivalent to 9*6?(9和6也都有方框围着)A 81 B 54 C 26 D 27 E 18 (所有选项数字都围着) 为啥答案是选D呢?? 我怎么算都是A啊??
DS题: 二,If Xand y are integers.What is the value of x+y? 1,690小于X小于Y小于695 2,692小于X小于Y小于695. 为啥选B呢??Statement 2 ALONE is sufficient but 1 alone is not sufficient?? 求解求解!!!