There are six red balls and six blue balls of the same size in the box. 1. If you want to find two balls of the same color, how many balls at least? 2. There must be three balls of the same color in order to touch them. How many balls should we touch at least? 3. If you want to touch the ball, there must be two colors. How many balls should you touch at least?

1. At least three balls may be one blue and one red in the first two times, so there must be two balls of the same color in another time
2. At least five balls may be two blue and two red in the first four times, so there must be three balls of the same color in another time
3. Touch at least 7 balls

There are six red, yellow, blue and white balls of the same size in the box. There must be a pair of balls of the same color that you want to touch. How many balls should you touch at least?
Want to touch out the ball must have two pairs of the same color, at least to touch out a few balls?

There are six red, yellow, blue and white balls of the same size in the box. If you want to touch out a pair of balls, you must touch out at least five balls of the same color
Red, yellow, blue and white
Want to touch out the ball must have two pairs of the same color, at least to touch out seven balls
Red yellow blue white 4 colors red yellow blue white 6 balls each

Put 70 table tennis balls in a box, and each box contains the same amount. How many ways are there? How many boxes do you need for each packing method?

The factors of 70 are: 1, 2, 5, 7, 10, 14, 35, 70; the packing methods are: 70 = 1 × 70; a box of 70, a box; or a box of 70; 70 = 2 × 35, a box of 35, a box of 2; or a box of 2, a box of 35; 70 = 5 × 14, a box of 5, a box of 14; or a box of 14, a box of 5; 70

There are 100 red, yellow, blue, green and black glass balls. Among them, 12 are red, 27 are yellow, 9 are blue, 19 are green and 33 are black. Put these balls in a cloth bag. Please think about: how many balls can be taken out at a time to ensure a red ball? Please write down the thinking process

Because it is possible to take out all the other balls before getting the red ball, it is necessary to ensure that at least one red ball is taken out
27 + 9 + 19 + 33 + 1 = 89

Xiaogang has 274 yellow and green glass balls, one in every three glass balls is yellow and two are green. How many balls are there in each of these two colors

274 / 3 = 91 (Group), 1 (yellow)
91-1 = 90
So the green one is 90 more than the yellow one
（274-x）-x=90
274-2x=90
x=92
The results show that there are 92 yellow ones and 274-92 = 182 green ones
Answer: there are 92 yellow ones and 182 green ones

There is a box of glass balls in red, yellow and green, and the number is close to 400. Among them, red glass balls account for 14% of the total, yellow glass balls account for N9% of the total. The number of green glass balls is not the most or the least. How many red, yellow and green glass balls are there?

Because the number of balls is a multiple of 4 and 9 and close to 400, the total number of balls is 396. Then red balls: 360 × 14 = 99, yellow balls: 396 × N9 = 44N; then green balls: 396-99-44n = 297-44n, because the number of green glass balls is not the most or the least, so: in the first case: 297-44n > 99, n < 4.5, when n = 1, yellow balls: 44, green balls: 253, not in line with when n = 2, Yellow ball: 88, green ball: 209, inconformity: when n = 3, yellow ball: 132, green ball: 165, inconformity: when n = 4, yellow ball: 176, green ball: 121, accord with the second case: 297-44n < 99 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; N > 4.5 when n = 5, yellow ball: 220, green ball: 77, not in line with the conclusion, when n = 4, yellow ball: 176, green ball: 121. Red ball: 99. Answer: there are 99 red balls, 176 yellow balls, 121 green balls

There are 30 glass balls in red, yellow, blue and green, of which 8 are red, 9 are yellow, 7 are blue and 6 are green
At least how many glass balls can be taken out at a time to ensure that there must be a red one? At least how many glass balls can be taken out at a time to ensure that there must be at least one in each color?

Take out at least 23 glass balls at a time to ensure that there must be a red one,
Remove at least 25 glass balls at a time to ensure at least one of each color

There are two red, two yellow and two blue balls in one bag. If you want to pick out any two balls, what color they may be? How many possibilities are there? (it's best to draw a picture)
Quick search

The possible colors are: red, red; red, yellow; red, blue; yellow, yellow; yellow, blue; blue, blue. There are six possibilities

Urgent! Tomorrow night! Kneel down!
There are enough red, yellow and blue balls in the bag. 32 students go to the bag to touch them. Each student can only touch them once, and they can only take three balls at a time. How many of them have the same color?

From the most disadvantageous point of view to test the first three students take different three 32 divided by 3 is more than 10 2. Then the two balls are separated, 10 plus 1 is equal to 11. There are 11 people with the same color of the ball

There are 10 red, yellow, blue and three colors in the pocket. How many balls do you want to get at least to ensure that you can get four balls of the same color?

At least 3 * 3 + 1 = 10
Drawer principle
Because take 9 may be 3 red, 3 yellow and 3 blue, take another one, there must be 4 of the same color

There are six red, yellow, blue and white balls of the same size in the box. There must be a pair of balls of the same color that you want to touch. How many balls should you touch at least? Want to touch out the ball must have two pairs of the same color, at least to touch out a few balls?