Question

What is the greatest possible four-digit number from the digits 5, 1, 2, and 1?

• A. 2511
• B. 5121
• C. 5112
• D. 5211

Answer 1

The correct option is D 5211

To find the greatest possible four-digit number, we first need to place the largest of the given digits in a place with the highest place value.

$\therefore$ 5 will be in the thousands place.

We continue this process (with the remaining digits) till we have placed all the four digits.

$\therefore$ 2 will be in the hundreds place.

1 will be in the tens place.

Lastly, the next 1 will be in the ones place.

$\begin{array}{cccc}\text{Thousands}& \text{Hundreds}& \text{Tens}& \text{Ones}\\ 5& 2& 1& 1\end{array}$

Thus, the greatest possible 4-digit number we can make from the digits is 5211.