脳ﾄﾚ算数 Hit&Blow

Brain Training Math Hit&Blow is a game that guesses the number that goes into a to d by solving math problems.　　　　　　　
For example, if the problem is a + b = X, the correct answer is 3 + 6 = 9.
If your answer is 3 + 6 = 9, it will be H2B0, which is correct.　　　　
If your answer is 6 + 3 = 9 then H0B2.
The number of B is good, but the location is different.　　　
If your answer is H0B0 such as 7 + 2 = 9,
That number is wrong.　　
Do not use the same number from 0 to 9 twice.
There will be 3 questions in total, and each question will be graded.
Please train your brain aiming for a perfect score (120 points).