I would say.... order does not really matter. It also varies person to person. Say for example I find number property tougher than combinatorics. Here are my 2 cents ...
i. Start with GMAT Club book (free pdf & more than enough)
ii. Practice mindfully at various difficulty levels ( move up in diff level 1 by 1...i.e., when you reach 80% in 500 level ... then move to 600 level and so on)
PS: https://gmatclub.com/forum/gmat-ps-ques ... 27957.html
DS: https://gmatclub.com/forum/ds-question- ... 28728.html
Good Luck !!
i. Start with GMAT Club book (free pdf & more than enough)
ii. Practice mindfully at various difficulty levels ( move up in diff level 1 by 1...i.e., when you reach 80% in 500 level ... then move to 600 level and so on)
PS: https://gmatclub.com/forum/gmat-ps-ques ... 27957.html
DS: https://gmatclub.com/forum/ds-question- ... 28728.html
Good Luck !!