Kyatric thank you so much :)
you can help me? so I have a math problem how to answer may not be the same.
ex : 7+3
answer :
image 1 : 12 (Random 10-20)
image 2 : 10 (this is answer)
image 3 : 15 (Random 10-20)
image 4 : 20 (Random 10-20)
so there is one correct answer three more random answers.