帮帮我啊

帮帮我啊

Q32:

Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column.  What is the value of r?

(1)     v + z = 6

(2)     s + t + u + x = 6

解不来啊，什么意思啊题目？

The question means: for each row and column there is exactly one 1, one 2, one 3. In other words, no column or row can have, lets say, 2,2,3 or 113, or 332. It can only be 1,2,3.

So according to statement 1, v+z=6, v must ve 3, z must also be 3, to get a total of 6. Since the second column in which v lies cannot have more than one 3, nor the third column in which z lies, we can conclude that r must be a 3.

Likewise, statement 2 tells us that s,t,u,x are either 1's or 2's. So r must be 3.

Hope it helps.

就是说9个格子，任1行和任1列，都是1,2,3数字的排列

由1 v＋z=6，只有1种可能，就是v=3,z=3(如果有<3的，就必须有>3的)，而v=3 z=3，根据上面说的条件，r必=3

由2 s+t+u+x=6,则st和ux必然是1,2的组合，那么r必=3