Question

Which of the following is aprime number?Enter a, b, c, d, or e.a. 211b. 187C. 219d. 183e. 177

Answer 1

A prime number is a number that has only 1 and itself as factors.

If the number has any other factor, it is not a prime number.

So let's factor each number to find which one is prime:

`\begin{gathered} 211: \\ 1,211\\ \\ \\ \\ 187: \\ 1,11,17,187\\ \\ \\ \\ 219: \\ 1,3,73,219\\ \\ \\ \\ 183: \\ 1,3,61,183\\ \\ \\ \\ 177: \\ 1,3,59,177 \end{gathered}`

Therefore the only prime number is 211.

Correct option: a.