CAT Quantitative Ability Questions | CAT Number System questions
CAT/2004
Question . 104
If a, a + 2 and a + 4 are prime numbers, then the number of possible solutions for a is
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Explanatory Answer
Method of solving this CAT Quantitative Ability Question from Number System question
(a) a, a + 2, a + 4 are prime numbers.
Put value of ‘a’ starting from 3, we will have 3, 5 and 7 as the only set of prime numbers satisfying the given relationships.