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如何利用数学原理读心（猜数字）

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只要你记住以下步骤，不需要太聪明，也能单靠数字，让朋友以为你懂得“读心术”。

方法 1

方法 1 的 3:

得到答案3

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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/d\/de\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-2.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-2.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/de\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-2.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-2.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/b\/b6\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-3.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/b6\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-3.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-3.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/1\/16\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-4.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-4.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/16\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-4.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-4.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

例如，如果他们在步骤1中选择3，则应该用现在的数字，也即是30除以3。
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/8\/84\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-5.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-5.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/84\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-5.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-5.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/d\/d1\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-6.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-6.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/d1\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-6.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-6.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

只要步骤正确，答案永远都会是3！

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方法 2

方法 2 的 3:

把它变得更复杂

下载PDF文件

{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/9\/95\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-7.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-7.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/95\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-7.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-7.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/4\/4b\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-8.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-8.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/4\/4b\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-8.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-8.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/5\/54\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-9.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-9.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/5\/54\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-9.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-9.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

让朋友将这个数字与他们心里目前的数字相加。
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/7\/71\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-10.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-10.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/71\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-10.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-10.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/f\/ff\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-11.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-11.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/ff\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-11.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-11.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/e\/e6\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-12.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-12.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/e\/e6\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-12.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-12.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

只要步骤正确，答案应该是你在步骤3给他们的数字的一半。

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方法 3

方法 3 的 3:

得到答案13

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{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/2\/25\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-13.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-13.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/25\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-13.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-13.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/f\/f1\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-14.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-14.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/f1\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-14.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-14.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/a\/a6\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-15.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-15.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a6\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-15.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-15.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

个位数的话（例如9），则加0。
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/7\/70\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-16.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-16.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/70\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-16.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-16.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/a\/a6\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-17.jpg\/v4-460px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-17.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a6\/Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-17.jpg\/v4-728px-Read-Someone%27s-Mind-With-Math-%28Math-Trick%29-Step-17.jpg","smallWidth":460,"smallHeight":306,"bigWidth":728,"bigHeight":484,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

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小提示

先熟悉这些步骤，才开始读心。
进行方法2的步骤3前，先在心里想好一个数字。
给他们一些时间。心算并不容易，尤其是对小孩而言。如果可以，给他们一台计算器。
在方法1的步骤4中，答案永远都会是10。如果你同时对许多人耍把戏，可以更换步骤5的数字。只要用10减掉步骤5的数字，就能算出最终答案。
在方法3的步骤4中，你可以让他们随便加或减任何数字。只要记住，把你告诉他们的数字加9或减9，就能算出最终答案。

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警告

如果同时有2个或更多同伙，这些方法就无法起作用了。

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