比24少1的数是23，而4不是少于24的数。这个问题看似简单，但它引发了对数学运算和思维逻辑的深入思考。在解答这个问题之前，我们先来回顾一下一些基本的数学概念和运算规则。

首先，数学中有一个非常重要的概念，那就是数字。数字是用来表示数量或者顺序的符号，它们可以用来进行计算和比较。在这个问题中，24是一个数字，它代表了一个具体的数量。

其次，我们需要了解减法运算。减法是一种基本的数学运算，用来计算两个数的差值。在减法中，被减数是要减去的数，减数是减去另一个数的数。在这个问题中，24是被减数，而1是减数，我们要计算的是24减去1的结果。

现在我们来解答这个问题。根据减法运算的定义，我们将24减去1得到的结果是23。所以比24少1的数是23。

那么，问题中提到的“4的是多少”怎么理解呢？我们可以将问题重新表述为“找出一个数，这个数比24少1，并且它等于4。”我们需要找到一个数同时满足这两个条件。

但是，这个问题存在一个矛盾。如果一个数比24少1，那么它必然比24小，因此无法等于4。所以，从逻辑上来说，不存在一个同时满足两个条件的数。因此，我们无法找到一个使得条件成立的数。

总结起来，比24少1的数是23，而4不是比24少1的数。通过解答这个问题，我们加深了对数学运算和逻辑思维的理解。

English Translation:

The number that is 1 less than 24 is 23, and 4 is not a number that is less than 24. This question seems simple, but it raises deeper thoughts on mathematical operations and logical thinking. Before answering this question, let's review some basic mathematical concepts and rules.

Firstly, there is a very important concept in mathematics called numbers. Numbers are symbols used to represent quantity or order, and they can be used for calculation and comparison. In this question, 24 is a number that represents a specific quantity.

Secondly, we need to understand subtraction. Subtraction is a fundamental mathematical operation used to calculate the difference between two numbers. In subtraction, the minuend is the number to be subtracted from, and the subtrahend is the number to be subtracted. In this question, 24 is the minuend, and 1 is the subtrahend. We want to calculate the result of subtracting 1 from 24.

Now let's solve this question. According to the definition of subtraction, subtracting 1 from 24 gives us a result of 23. So, the number that is 1 less than 24 is 23.

Then, how should we understand the phrase "4的是多少" in the question? We can rephrase the question as "Find a number that is 1 less than 24 and equals 4." We need to find a number that satisfies both conditions.

However, there is a contradiction in this question. If a number is 1 less than 24, it must be smaller than 24 and cannot equal 4. Therefore, logically speaking, there is no number that simultaneously satisfies both conditions. Hence, we cannot find a number that satisfies the given conditions.

In conclusion, the number that is 1 less than 24 is 23, and 4 is not a number that is 1 less than 24. By answering this question, we deepen our understanding of mathematical operations and logical thinking.