Aunt Zhang buys clothes for her children. There are three colors: red, yellow and white, but at least two children always have the same color. Ask for clothes for at least () children.
3. Give six different continuous natural numbers at will, and the difference between at least two of them is a multiple of 5. Can you tell me why?
There are 30 students born in the same month in Democratic Primary School. Only when these 30 students are born can it be guaranteed that at least two students will be in the same Amanome?
5. There are 50 balls with the same number in one pocket, in which 10 is numbered 1, 2, 3, 4 and 5 respectively. (1) How many balls must be taken out to ensure that there are at least two pairs of balls with the same number? (2) How many balls must be taken out at least to ensure five balls with different numbers?
1, if both sides have the same color, there are more walls than colors, so there are 4- 1=3 kinds.
2, the same number of people is greater than the number of people in color, so it is at least 3+ 1=4.
3, divided by 5, the remainder may be 0, 1. There are five natural numbers 2, 3, 4 and 6, and at least two of them divide by 5 with the same remainder, and their difference can be divisible by 5.
4. Make sure that at least two students have the same birthday, and the number of days is less than the number of students, that is, at most 30- 1=29 days, so it is February.
5. (1) 5+1+1 = 8,1,2,3,4,5 each1,plus any one, at least1logarithm can be guaranteed at this time. (2) Five, one for each number.