Place Value Pattern: Finding Numbers with Matching Thousands and Tens Digits

To solve the problem, we will examine each number given and evaluate the digits in the thousands and tens places:

• $5105$: The thousands digit is $5$ and the tens digit is $0$. They are not the same.
• $4140$: The thousands digit is $4$ and the tens digit is also $4$. They are the same.
• $2333$: The thousands digit is $2$ and the tens digit is $3$. They are not the same.
• $1121$: The thousands digit is $1$ and the tens digit is $2$. They are not the same.

Based on the analysis above, the only number in which the thousands digit is the same as the tens digit is $4140$.

Therefore, the solution to the problem is $4140$.