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17 Dec 2014, 07:50
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If each of the positive integers a, b, and c is a prime number and abc = 30, what is the value of c ?
(1) a < b < c
(2) a + b = c
(1) a < b < c
(2) a + b = c
17 Dec 2014, 08:31
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30 can be written as different prime factors as only in below case
2*3*5
1. a<b<c. clearly c=5 sufficient.
2. a+b=c. again 5=2+3 so c=5. sufficient
Ans D
2*3*5
1. a<b<c. clearly c=5 sufficient.
2. a+b=c. again 5=2+3 so c=5. sufficient
Ans D
20 Dec 2014, 11:05
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Given: a, b, c are prime numbers and abc = 30, what is the value of c ?
Since abc is even, atleast one of them must be even prime number 2.
3 and 5 are the only other prime numbers yielding a product of 15
Statement 1: a < b < c
Thus c=5 -- Sufficient
Statement 2: a + b = c
Thus c=5 -- Sufficient
Each statement alone is sufficient, Answer D
Since abc is even, atleast one of them must be even prime number 2.
3 and 5 are the only other prime numbers yielding a product of 15
Statement 1: a < b < c
Thus c=5 -- Sufficient
Statement 2: a + b = c
Thus c=5 -- Sufficient
Each statement alone is sufficient, Answer D
