Jacky baked some biscuits. he kept 3/7 of the biscuits in container A. 5/8 of the remainder in container B and rest in container C there were 168 more biscuits in container A than in container C. how many biscuits dud Jacky bake?

Let "b" represent the number of biscuits Jacky baked.

... container A holds (3/7) b

... container B holds (1 - 3/7) * (5/8) b = (5/14) b

... container C holds (1 - 3/7 - 5/14) b = (3/14) b = 168

Then

... b = 168 / (3/14) = 784

Jacky baked 784 biscuits.