Confuse Arithmetic

Confuse Arithmetic
In this game, you will be shown some random set of pictures. All Pictures will be unique.
Now a mathematics puzzle will appear on your screen for a moment. In between this two pictures will swap their positions with each other.
Now your objective in this game is to identify and tap those two swapped pictures.
Right answer will earn you one point. Wrong answer wil end your game. There is timer also.
So you have to quickly decide. There are 3 game mode, each having its own difficulties and reaction time.