题目

十万火急
We have coins of 1 point,2 points,5 points in a bag.A takes 3 coins.B takes 2.Out of the 5 coins,there are only two kinds of value.The value of 3 coins of A is less than that of the coins of B.What's the total number of the coins at most?
A.13             B.15             C.17                D.19
There are only two questions a mathematics test.10 students get both correct answers.25 students get the correct answer to the first question,18 students get the wrong answer to the second question.How many students get neither of the answers?
A.10              B.3                  C.7               D.15
A string of 40 beads is in the order of 8 red ones and 2 black ones.A cricket jumps from the second black bead.Every time it jumps over 6 beads and fall

提问时间：2021-09-10

答案

D,B,D,B第一题说一个袋子里有1分,2分,和五分三种硬币,A从里拿出3个,B拿出两个.拿出来的五个硬币中,只有两种价值.A手里的价值小于B手里的价值,问最多可有多少个硬币在袋子里?二题说一共两道数学题,10个同学两道都答对...