Hi sir,
In mock ( QA, DILR ) there are certain sums which I am not able to do...I am 100% sure that those are the exact models I have practised or seen in previous mocks at that during the analysis I have re practised them ..but during some mock if the same exact model is given again I am forgetting/not able to do then again ...what is the efficient way to remember/revise ....in short period because I know ..revising every sum I have practised/ mock again is time consuming ...I am maintaining a book where I write important models ...but what if I miss the problem which I think is easy at that time and didn't write and in next mock it came and I was not able to Solve it ...

please help me with an revision strategy for this problem