1.有8个盒分别装有17个、24个、29个、33个、35个、36个、38个和44个乒乓球，小赵先取走一盒，其余各盒被小钱、小孙和小李取走，已知小钱和小孙取走的乒乓球个数相同，并且是小李取走的两倍，则小钱取走的各个盒子中的乒乓球数最可能是（ ）。
A.24个，38个
B.24个，29个，36个
C.24个，29个，35个
D.17个，44个
2.六年级某班学生中有1／16的学生年龄为13岁，有3／4的学生年龄为12岁，其余学生年龄为11岁，这个班的平均年龄是（ ）。
A.10.02
B.11.17
C. 11.875
D.11.675
3.有一堆棋子（棋子数大于1），把它们四等分后剩一枚，拿去三份零一枚，将剩下的棋子再四等分后还是剩一枚，再拿去三份零一枚，将剩下的棋子四等分还是剩一枚。问原来至少有多少枚棋子？（ ）
A.23
B.37
C.65
D.85
4.某中学共有学生1200名，每个学生每天上8节课，每位老师每天上4节课，每节课有50名学生和一名老师，问该中学共有几名教师上课？（ ）
A.48
B.40
C.36
D.24
5.一列客车长250米，一列货车长350米，在平行的轨道上相向行驶，从两车头相遇到两车尾相离经过15秒，已知客车与货车的速度比是5：3。问两车的速度相差多少？（ ）
A.10米/秒
B.15米/秒
C.25米/秒
D.30米/秒
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