There are different numbers and different results in this picture ,but you can see only + operation,find the math logic, how is each second number received?

Sometimes yourself you ask a question,how to check IQ of my kid ,answer is simple show this IQ quiz to your kid,if he finds right answer in less than 5 minute it means your kid has [...]

This brain quizzes contains math triangles and squares ,if your kid finds right answer it means he has good math IQ,look at the picture,what is right answer?