Data Sufficiency Flashcards
(11 cards)
How do I prove a statement is sufficient?
I do NOT need to do the work, if I can prove a formula yields a specific solution that is enough. Conserve mental energy
Does this statement provide a definitive & Concrete answer or NOT
What is AD
BCE
A = statement 1 is sufficient alone, NOT Statement 2
D= Both are sufficient independently
B = Statement 2 works alone, NOT 1
C = They ONLY work when combined
E = Data is completely insufficient
Which statement do I investigate first?
- The easier one
- One that appears to cannibalize the other statement (includes essentially all the information that the paired statement offers)
First step when dealing with DS is…
Determine Q type (what qualifies as a sufficient)
- Value: A single value works
- Yes/No: Always the same answer
- Choose one: Only a single option is valid
Be disagreeable when…
testing cases!
If I can find a conflict or inconsistency the claim is insufficient
What is the C trap?
Kindergarten Test: If they obviously give you enough information that combining both S1 and S2 would solve, cross off C & E…
Never jump to those answers until after isolating both statements
Twins signal…
The pair of statements provide the same information… immediately go to investigating D or E
Cannibal rule allows you to cross off…
C and either A/B corresponding to the statement swallowed since you have deduced the cannibal works alone (keep in mind D could still be possible)
Red flag of same logic…
Using logic between both statements to ignore or discount something mentioned in Q stem
“each statement ignored January so it’s not important in the stem”
The power of rephrase…
Take a second to see how you can change the words to make the testing cases process definitive and easier
1. Can you flip it to be in the negative
2. What’s the most restrictive answer
When testing cases…
Look at optional numbers and consider constraints of each given value
