公因數公倍數問題

👨🏻‍🏫 學術台數學

[匿名]

2006-10-27 3:29 am

在連續整數6、7、8、9. . . . . . .28、29、30的乘積的末尾有幾個零?

32張同大小相同且邊長為5公分的正方形色紙拼成各種不同形狀的正方形周長最大為多少公分?最小者為多少公分?

回答 (2)

用戶160446

2006-10-27 3:42 am

✔ 最佳答案

1.
Because 2*5 will have one 0 and because 2 is more than 5.Therefore,we just want to know how many 5 and 0 in these number:
There have three 5 (25 have two 5)and three 10 altogether.
3+3=6

2.
Square number for 1 to 32 is:1,4,9,16,25
The largest:5cm*5*4=100cm
The smallest:5cm*1*4=20cm

2006-10-26 19:45:49 補充：
1.Ans:There have six 0.

參考: Just my information

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人仔

2006-10-27 3:37 am

最小3個0,因為你要成10,20,30,so就有至小3個0
最大100cm
最小40cm
仲有咩數學既問題可以問我架^^^[email protected]

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