Line test - graphic reasoning - 2 - black and white lattice class

The thinking ideas of black-and-white questions are as follows ：

 

Catalog

One 、 Quantitative relation

1. Number of parts

2. Number of species

3. Area ratio

4. Number of strokes

5. Number  

Two 、 Position change

1. Move

3、 ... and 、 Regular superposition

Four 、 Self attribute

1. symmetry

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Specific examples for different classes are given below ：

One 、 Quantitative relation

1. Number of parts

（1）

The first group of graphic parts are 1,2,3; Therefore, the second group of figures also follow this Law , The number of selected parts is 3 Of A.

（2）

  Observe the number of parts of the white square 1,2,3,4. Therefore, the number of selected parts is 5 Of D.

2. Number of species

（1）

 1,3,4 There is only one black figure ;2,5,6 There are two black shapes .

3. Area ratio

（1）

1,2,6 The proportion of black area is 1/2;3,4,5 The proportion of black area is less than 1/2.

 （2）

  It is observed that the proportion of black area is 1/4, choice D.

4. Number of strokes

（1）

Just look at the figure formed by black dots .3,4,5 For a stroke of graphics ;1,2,6 For two strokes

5. Number  

 （1）

  Observe the number of black and white chess , The number of white is 10,9,10,9,10. Select white quantity as 9 Of B.

Two 、 Position change

1. Move

When the number of black and white in each picture does not change , Give priority to mobile changes . But there will also be changes in the number of mobile , When two grids overlap .

（1）

The first and second rows of black squares move to the right at a time 1 individual , The third and fourth lines move left at once 1 individual . choose C.

 （2）

The outer black grid moves counterclockwise 1,2,3,4 Step , The inner black grid moves clockwise every time 1 Step , So choose D. 

（3）

 （4）

Mark different black dots with different serial numbers , Purple ball doesn't move , The other three balls are either horizontal or vertical 2,1,1 The number of cycle steps moves . 

 （5）

 

Each line is seen as a group , Look at each group of black grids in the same row as a class , Mark with the same color . 

3、 ... and 、 Regular superposition

When the number of black and white in each picture changes , Give priority to rule superposition .

（1）

By observing the first group of pictures, we can see that the superposition law is ： black + black = white , white + black = white , white + white = black , black ＋ white = white .

Migrate to the second set of drawings , Answer selection D.

 （2）

The superposition rule is black + white = black , white + white = white , white + black = black , black + black = white . So choose C.

 （3）

The superposition rule is black + white = white , white + black = white , white + white = black . So choose B.

（4）

 

The superposition rule is black + white = white , white + black = black , white + white = black , black + black = white . So choose A.

（5）

 

The superposition law is ： The stars + white = white , white + The stars = white , white + white = The stars , The stars + The stars = The stars . So choose A.

 （6）

The superposition law is ： black + white = white , white + black = white , black + black = black , white + white = black . So choose A.

 （7）

The superposition rule is black + white = black , white + black = black , black + black = white , white + white = white . So choose D. 

（8）

  The superposition law is ： black + white = white , white + black = white , black + black = black , white + white = black . So choose D.

Four 、 Self attribute

1. symmetry

（1）

Observe that the symmetry axis direction of the black block turns counterclockwise 45 degree , So choose D.

 （2）

1,3,4 The axis of symmetry points to the upper left 45 degree ,2,5,6 The axis of symmetry points directly above .

 （3）

Observe the white chess pieces , The order is axisymmetric 、 Centrosymmetry 、 axial symmetry 、 Centrosymmetry 、 axial symmetry . Therefore, choose centrosymmetric A.