Problem number 16. One of the numbers in the picture is equal to the sum of the numbers connected directly to it. Which number is this? Rather than checking all the numbers in the picture, we can just check the ones that are listed as answers. Let's start with answer choice A, which is the number 3. It's connected to 12, 1, and 1. The sum of that is 14, so number 3 is not equal to the sum of the numbers connected to it. Now let's look at number 5, which is the next choice. It's connected to 7, 1, and 10, and the sum there is 18. That's also not the right number. Answer choice C is 7. 7 is connected to 1, 1, and 5, and 1 plus 1 plus 5 is equal to 7. So this will be the right answer. Number 7 is equal to the sum of numbers connected directly to it. Let's just go through the remaining two numbers to make sure we didn't miss anything. Number 10 is connected to 5 and 2 and 1. The sum is 2 plus 1 plus 5, which is equal to 8, so that is not a correct answer. And 12 is connected to 3, 1, and 4. The sum is 8, so it's also not correct. So the answer is C, 7.

number sum

connected numbers

problem solving

mathematics

answer choice