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1 . 如图为手的示意图,在各个手指间标记字母A、B、C、D.请你按图中箭头所指方向(即
的方式)从A开始数连续的正整数1,2,3,4,⋯,请你寻找规律,指出当字母B第2023次出现时,恰好数到的数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/0dbd85cc-b92c-45a7-b7de-42921c1868a9.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfe3c92d7c94d4ef79e0fcb209855c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/0dbd85cc-b92c-45a7-b7de-42921c1868a9.png?resizew=145)
A.6062 | B.6066 | C.6068 | D.6072 |
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2023-12-23更新
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124次组卷
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2卷引用:北京师范大学附属实验中学2023-2024学年七年级上学期月考数学试题
2 . 如图是2023年8月的月历:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/ff297d62-0ff7-4340-889a-66f4cef7f8ef.png?resizew=440)
(1)图1和图2在月历中框出4个代表日期的数
,请用一个等式表示a、b、c、d之间的关系;
(2)已知本月框出的4个代表日期的数字之和是88,那么最小的日期对应的是星期几?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/ff297d62-0ff7-4340-889a-66f4cef7f8ef.png?resizew=440)
(1)图1和图2在月历中框出4个代表日期的数
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/5c8a09eb-0110-415e-b39f-402b245677b1.png?resizew=59)
(2)已知本月框出的4个代表日期的数字之和是88,那么最小的日期对应的是星期几?
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3 . 如图,由等圆组成的一组图中,第1个图由1个圆组成,第2个图由7个圆组成,第3个图由19个圆组成,
,按照这样的规律排列下去,则第
个图形由( )个圆组成.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/2bb201e7-5295-4e1f-8a47-7278cfc52638.png?resizew=306)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/2bb201e7-5295-4e1f-8a47-7278cfc52638.png?resizew=306)
A.37 | B.61 | C.91 | D.127 |
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4 . 如图,已知
,一条光线从点
出发后射向
边,若光线与
边垂直,则光线沿原路返回到点
,此时
,当
时,光线射到
边上的点
后,经
反射到线段
上的点
,易知
.若
,光线又会沿
原路返回到点
,此时
;若光线从点
出发后,经若干次反射能沿原路返回到点
,则锐角
的最小角
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096ed138fdc1ab1a812ba3af7bbbe0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062bef075328a785c7022fda7f956a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79df8391dda3f69032dfbb15ca4d3dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535875e5dd2cafa3bd15ef5ac8bd84a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6a69ed0eda865412a5e71a8ac7e3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e38bdf4e6adbd2be735b47fa7e04e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/53b6fca8-4d90-43c8-aede-d9ead808a640.png?resizew=220)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 按一般规律排列的一列数依次为:
,
,
,
,
,
……,按此规律排列下去,这列数中的第
个数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca83504e351d7516f61a3052d7a31859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee5447f1268cfd1949810ba8db48308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e597f4d788e3f12b622e724cdddf0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbd658a410c59f1c65fcaf9eb00ad247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d01dd350dc95f42f1883e0cc7aae084.png)
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6 . 如图是一组有规律的图案,它们是由大小相同的五角星组合而成,第1个图案中有4个五角星,第2个图案中有7个五角星,第3个图案中有10个五角星……按照此规律摆下去,第20个图案中有__________ 个五角星.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/f5007a0a-baa1-4493-9628-0019a55dc7c3.png?resizew=397)
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7 . 观察下列关于正整数的等式:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60341f0442400e02dc730fd0869ded05.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f19b00b0f2202197df87b69914bc67c1.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd3d63ed16866daf3b91e6cbb5a332.png)
……
根据上述规律,回答下列问题:
(1)请写出第④个等式________ .
(2)直接写出你猜想的第m个等式(用含m的式子表示)________ .
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60341f0442400e02dc730fd0869ded05.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f19b00b0f2202197df87b69914bc67c1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd3d63ed16866daf3b91e6cbb5a332.png)
……
根据上述规律,回答下列问题:
(1)请写出第④个等式
(2)直接写出你猜想的第m个等式(用含m的式子表示)
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8 . 定义一种新运算:观察下列式子:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ce14ec4517a9f8c11ae04141c22007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c25f54b28d314c64642ed570424bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25e626713ccf34628f834dc2fc0bb6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdd2ac7cc03dcd437b1c9547eecae5a.png)
(1)请你想一想:
______;
(2)若
,那么
(填入“
”或“
”)
(3)若
,请计算
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ce14ec4517a9f8c11ae04141c22007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c25f54b28d314c64642ed570424bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25e626713ccf34628f834dc2fc0bb6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdd2ac7cc03dcd437b1c9547eecae5a.png)
(1)请你想一想:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c5f7aec77f2f11160a7ad0a1892e335.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/278314941d024c6a2a53d9991c3d3e65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411837b4b3078d05b43cb0439259a362.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88275afaaf1245d15f7141145c508987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776dda4b7b57833568611b6051707c22.png)
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2023-12-20更新
|
82次组卷
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2卷引用:江苏省镇江市丹阳市第八中学2023-2024学年七年级上学期数学第二次阶段测试
9 . 下列图形都是按照一定规律组成,第一个图形中共有2个三角形,第二个图形中共有8个三角形,第三个图形中共有14个三角形…,依此规律,第八个图形中三角形的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/674f2246-320d-4d38-bb46-030a671c14a4.png?resizew=457)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/674f2246-320d-4d38-bb46-030a671c14a4.png?resizew=457)
A.26 | B.32 | C.39 | D.44 |
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10 . 如图是一组有规律的图案,它们是由边长相同的灰白两种颜色的小正方形组成的,按照这样的规律,若组成的图案中有
个灰色小正方形,则这个图案是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/92033452-dee2-45ae-86a3-04db01d4e2bf.jpg?resizew=468)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd466424f9fc42ff269510f1be28528.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/92033452-dee2-45ae-86a3-04db01d4e2bf.jpg?resizew=468)
A.第![]() | B.第![]() | C.第![]() | D.第![]() |
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2023-12-19更新
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177次组卷
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5卷引用:安徽省宿州市砀山县2023-2024学年七年级上学期月考数学试题