2022-2023年Bebras挑战练习题-Treasure Box(宝箱)

Maria found a box containing hidden treasure, but the box was locked.玛丽亚发现了一个装有隐藏宝藏的盒子,但盒子是锁着的。

To unlock the box, she needs to use the correct combination of three shapes.要打开这个盒子,她需要使用三个图形的正确组合。

Help Maria unlock the box by following the given hints on the right of the combinations shown below.请按照下面组合密码右侧给出的提示帮助玛丽亚打开这个盒子。

2022-2023年Bebras挑战练习题-Treasure Box(宝箱)

Question:问题:

Which of the following combinations will unlock the treasure box?以下哪一种组合能打开宝箱?

A.

B.

C.

D.

   

 

 

 

 

 

Explanation 解释

Answer: 答案:

Explanation: 解释:

We will start by eliminating the shapes that do not fit into the combination that unlocks the box.我们将从排除那些不符合能打开盒子的组合的形状开始。

In the second row of hints, we see that nothing belongs in our combination, which means that the Christmas three , diamond  and arrow  do not lead to unlocking the box.在第二行提示中,我们看到没有任何东西属于我们的组合,这意味着圣诞树、菱形和箭头都不能打开这个盒子。

In the last row of hints, we see that one shape is correct, but placed incorrectly.在最后一行提示中,我们看到有一个形状是正确的,但位置放错了。

We have previously concluded that the Christmas tree and the arrow are not used, so the shape we need is a star , but it is placed incorrectly.我们之前已经得出结论,圣诞树和箭头没有用到,所以我们需要的形状是星星,但它的位置放错了。

The possible positions of the start are as follows:起点可能的位置如下:

 or We can continue to find the other two shapes.我们可以继续找出另外两种形状。

From the first row, we see that one form is correct and in the right place. We reject the arrow because it does not belong to the final combination, so it follows that one of these combinations is correct:从第一行来看,有一种形式是正确的,并且处于正确的位置。我们排除箭头,因为它不属于最终的组合,所以可以得出结论,这些组合中有一个是正确的:

 or From the third row, we see that two shapes are correct, but placed incorrectly.从第三行来看,有两个图形是正确的,但位置放错了。

We definitely need the star, but its position is not in the middle, so now we have definitely found the position of the star and that position is given in the following picture:我们确实需要那颗星,但它的位置不在中间,所以现在我们已经确切地找到了那颗星的位置,其位置在下面的图片中给出:

We found one shape and it's correct position. Likewise, we continue this process to find the remaining two shapes.我们找到了一个形状及其正确位置。同样地,我们继续这个过程来寻找剩下的两个形状。

From the first row, we had:从第一行,我们有: or 

Since we found the star to be in the first position, the triangle can't be in the first position. So, it follows that the moon is in its correct position. This leaves us with:既然我们发现星星处于第一个位置,那么三角形就不能在第一个位置。所以,月亮就在其正确的位置。这样就剩下:

From the fourth hint, we see that one shape is correct, but incorrectly placed. The triangle  is out, and the only position left is the middle position. The heart  can't be correct, because it is in the middle position. Thus, the only shape that can be in the middle position is the circle .从第四个提示中可以看出,有一个图形是正确的,但位置放错了。三角形被排除在外,剩下的唯一位置就是中间位置。心形不可能正确,因为它在中间位置。所以,唯一能放在中间位置的图形就是圆形。

There are other possible ways to determine the answer other than the explanation above. All these different ways will still lead to the correct answer.除了上述解释之外,还有其他可能的方法来确定答案。所有这些不同的方法最终都会得出正确的答案。

点击右侧文字,可获得更多在线练习题资源:>>> Bebras在线水平测试

Bebras新赛季备赛已开启,扫码领取Bebras真题资料⇓

欢迎咨询【Bebras专业辅导课程】

(Bebras每日一练部分展示)

在线客服
微信咨询