I have never ever counted how many scales etc there are for any one exam. Counting them all up makes the task look so huge. It's easier to think of all the scales as connected in some way - a bit like the London Underground system and the tracks through your brain for remembering them!
It might help to make 'family connectons' between scales so you can group them all into manageable 'packages'. Take one letter G as a starting note. You should find there are at least 8 connections to other scales.
For example - practise G major - then - the tonic minor G minor, the relative minor E minor, it's tonic major E major. That's four done.
Then maybe go to the relative minor of E major - C# minor - tonic major - C#/Db major - the relative minor Bb minor etc etc.
You could of course decide to go to nearest keys to the # or b side from G - to D major or back to C major.
Another method for getting through them is to choose one letter a day/week and do everything possible from that letter - scale, arpeggio, chromatic, thirds, dominant 7th - whatever is required.
I agree with all the advice about getting a scale book to check out fingering - really important - and as already said, knowing the enharmonics cuts down the work too. Another way of practising - group scales into 'same fingering pattern groups'.
Good luck