两道数学题,百思不得其解,请教大家.多谢
1.There are between 100 and 110 cards in a collection of cards. If they are counted out 3 at a time, there are 2 left over ,but if they are counted out 4 at a time, there is 1 left over. How many cards are in the collection?(惭愧,这题目小弟都看不明白,请高手解释一下,答案是101.)
2. What is the least possible product of 4 different intergers, each of which has a value between -5 and 10, inclusive? 答案有-5040,-3600,-720,我认为是第一个正确,但书上答案是第二个.不过如果用-5乘8,9,10,结果不正好是-3600吗? |