In the RDT&E example, what is the sum of 2 and 5?

In the RDT&E example, what is the sum of 2 and 5?

• A. 6
• B. 8
• C. 7
• D. 9

Answer: (C)

Addition of small integers is being tested. Adding 2 and 5 gives seven, since counting up from 2 by 5 or from 5 by 2 yields 7. Therefore the correct choice is the one that shows 7. The other numbers (6, 8, 9) do not equal 2 plus 5.

Addition of small integers is being tested. Adding 2 and 5 gives seven, since counting up from 2 by 5 or from 5 by 2 yields 7. Therefore the correct choice is the one that shows 7. The other numbers (6, 8, 9) do not equal 2 plus 5.