
七上數學2-1練習8
Quiz
•
Mathematics
•
7th Grade
•
Practice Problem
•
Easy
黃俊賓 關山國中
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10 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
下列哪一個數是 2 的倍數也是 11 的倍數?
1568
2222
2468
3456
Answer explanation
(A)(C)(D)均非 11 之倍數
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列敘述何者正確?
所有偶數皆為合數
所有奇數皆為質數
21 是奇數,所以 21 是質數
最小的質數為 2
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
下列選項的敘述中,何者正確?
31 的因數有 1 和 31,所以 31 不是質數
35 的十位數和個位數都是質數,所以 35 是質數
2 雖是偶數,但也是質數
23 沒有任何因數,所以 23 是質數
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下圖為鈞鈞分別利用樹狀圖分解 a 的過程,則 a + b + c = ?
250
251
252
253
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
請判斷下列何數不是 4 的倍數?
123456
876542
338844
99776
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
有多少個正整數同時是 15 的倍數,也是 150 的因數?
3 個
4 個
5 個
6 個
Answer explanation
15 的倍數有 15 、︑ 30 、︑45、︑60、︑ 75 、︑90、︑105、︑120、︑130、︑ 150
150 的因數有 1、︑2、︑3、︑5、︑6、︑10、︑ 15 、︑25、︑ 30 、︑50、︑ 75 、︑ 150
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列四位學生的敘述,何者錯誤?
甲生:「2 是最小的質數。
乙生:「1~10 中的質數有 4 個。
丙生:「329 有質因數 3。
丁生:「525 有質因數 5。」
Answer explanation
(C) 329=7×47,並沒有質因數 3
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