如何有选择地为每张卡显示解决方案？

in my app I have a Next button and a Solution button. When you press next a new card comes up (i.e. Image card1), if you press again next another card comes up in a random way. My question is how to display the solution for each card selectively (i.e. for card1 there is the sol1) in my app I have a Next button and a Solution b