题目内容


(6分) 如图①、图②、图③……是用围棋子摆成的一列具有一定规律的“山”字.

(5)   按图示的规律填空.
图形标号




……
围棋子的数目(颗)
7
 
 
 
 
(6)   第n个图形所对应的围棋子的数目为___________颗.
若某个图形中有围棋子142颗,它是第__________个图形.

(1) 12,17,22
(2)  
(3) 28

解:(1) 12,17,22···················································································· 3分
(2) ·················································································· 5分
(3) 28·························································································· 6分
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