Update 1.1.0.2 - Fixed light theme issue. Yog is sanskrit meaning of addition. This game requires great mind, eye and hand co-ordination. Instructions: There are two modes in the game. 1. 2 Seconds 2. Time Trial In 2 seconds mode you get two seconds to tap on right answer and as the game progress the difficulty level of question increases. In time trial mode you get two minutes to finish maximum number of addition.