1. The problem asks which numbers have 2 as a factor. A number has 2 as a factor if it is divisible by 2, meaning it is an even number. 2. The rule for divisibility by 2 is that the number must end in 0, 2, 4, 6, or 8. 3. Check each number: - A. 21 ends with 1, so it is not divisible by 2. - B. 90 ends with 0, so it is divisible by 2. - C. 31 ends with 1, so it is not divisible by 2. - D. 62 ends with 2, so it is divisible by 2. 4. Therefore, the numbers that have 2 as a factor are 90 and 62.