RRB NTPC · Data Sufficiency Rules

Exercise and reference answers

Matching pairs

1. Left

   x? I: 2x+3=11, II: x is even

   Right

   I alone suffices

2. Left

   Is N prime? I: odd, II: 2 factors

   Right

   II alone suffices

3. Left

   Find x, y: I: x+y=10, II: x-y=2

   Right

   Both together needed

4. Left

   Num? I: 2-digit, II: digit sum 5

   Right

   Neither, even together

Instructions

Determine sufficiency of each statement pair