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What is the missing number?[img]2012q2/ct_eyyjscz2007a_eyyjsciq_0096_20121[/img
What is the missing number?[img]2012q2/ct_eyyjscz2007a_eyyjsciq_0096_20121[/img
游客
2024-08-15
43
管理
问题
What is the missing number?
选项
A、748.
B、754.
C、745
D、784
答案
B
解析
推导规律:728=(5+5+6)/2+2 x 10+700,731=(8+6+8)/2+2 x 1O+700。公式:图形中间数字=(a+b+c)/n+m×10+700(注:n表示n个数字重复出现,m×10表示共有m个不同数字)所以答案为(9+7+8)/1+3×10+700,即754。
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