The numbers between 1 and 4 are 2 and 3.

#### Supplemental Knowledge:

When we talk about the numbers between two given numbers, it's important to clarify whether we are including the endpoints or not.

For example, in the interval from 1 to 4:

1. If we consider only whole numbers and exclude the endpoints (1 and 4), we are looking for whole numbers strictly between 1 and 4.

2. If we include all possible numbers (including decimals) between 1 and 4, there are infinitely many.

**For whole numbers:**

- The whole number strictly between 1 and 4 is just 2 and 3.

**For decimals:**

- There are infinitely many decimal numbers between any two given numbers. For example, between 1 and 2, you have numbers like 1.1, 1.01, 1.001, etc.

#### From Concepts to Reality:

Imagine organizing a children's race where participants range in age from just over one to just under four. If only older than one but younger than four participants were permitted, you'd end up with kids between the ages of two and three participating.

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