Difficulty in ITTO's

I have done 1 reading of PMBOK and Rita and when attempting mock I am scoring 65% due to many questions getting wrong in ITTO'S ..seems the mid 30's effect is having on memory ..jokes apart I have tried writing them on paper but somehow not able to register them thoroughly ..don't want to do rote learning ..any expert tips to register them logically or there are any notes or URL/site references which connect them