There are five glass balls in each of three colors in the bag. If you feel at least a few glass balls, you can guarantee that there are two kinds of glass balls in the same color?

Touch at least four balls

RELATED INFORMATIONS

1. It is known that: as shown in the figure, ∠ B = ∠ C = 90 °, M is the midpoint of BC, DM bisects ∠ ADC. (1) prove that am bisects ∠ bad; (2) try to explain the position relationship between DM and am? (3) What is the relationship between CD, AB and ad? Write the results directly
2. The sum of three consecutive even numbers is 3a, and the smallest of the three numbers is 3a______ The biggest is______ ．
3. If there is a point on the right branch of hyperbola x2a2 − y2b2 = 1 (a > 0, b > 0), and the distance from it to the right focus and the left quasilinear is equal, then the value range of eccentricity of hyperbola is () A. (1，2]B. [2，+∞)C. (1，2+1]D. [2+1，+∞)
4. If there is a point on the right branch of hyperbola x2a2 − y2b2 = 1 (a > 0, b > 0), and the distance from it to the right focus and the left quasilinear is equal, then the value range of eccentricity of hyperbola is () A. (1，2]B. [2，+∞)C. (1，2+1]D. [2+1，+∞)
5. (x2-2xy + Y2) - (x2 + 2XY + Y2) = what
6. 2xy-x2-y2+9 Decomposition cause death form
7. What is the sum of [1 / 2XY + Y2 + 1] + [x2-1 / 2xy-2y2-1]
8. Given x2 + y2 = 2, find the value range of x2-2xy-y2
9. If y = √ 1-2x + √ 2x_ 1 + 1 / 2, find √ x2 + Y2 - √ x2 + Y2 + 2XY =?
10. What is the cubic power of AX2 + 2a2x + A and - 2xy-x2-y2,
11. A four digit integer is first rounded to ten, then rounded to hundreds, and then rounded to thousands. At this time, the number is the third power of 3 * 10. What is the maximum and minimum value of this number! Please tell me how to calculate it
12. In the number of columns 1, - 3,5, - 7,9, - 11 ~ at least take out a few numbers to make the sum equal to 0 I'm in urgent need. I hope those who can answer
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14. Mathematical sequence, finding the law 1,3,2,6,5,15,14,x,y,z,122…… The values of X, y and Z are? What are the rules in this series?
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16. Uncle Li's family has 120 chickens, one sixth less ducks than chickens. How many ducks are less than chickens? How many ducks does Uncle Li's family have?
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20. Delete a number in the following sequence to change its range rule: 359 13 18 27 33 81 89