OFFICIAL EXPLANATION
Hi All,
We're told that Levon has carrots, Brussel sprouts, and celery sticks in his refrigerator. We're asked for the ratio of the number of carrots to the number of celery sticks. This question can be solved in a couple of different ways, including with a mix of logic and TESTing VALUES.
1) The number of carrots is 8/15 the number of Brussel sprouts.
Fact 1 gives us a ratio between the number of carrots and the number of Brussel sprouts, but tells us nothing about the number of celery sticks.
Fact 1 is INSUFFICIENT
2) The number of Brussel sprouts is three times the number of celery sticks.
Fact 2 gives us a ratio between the number of Brussel sprouts and the number of celery sticks, but tells us nothing about the number of carrots.
Fact 2 is INSUFFICIENT
Combined, we know...
The number of carrots is 8/15 the number of Brussel sprouts
The number of Brussel sprouts is three times the number of celery sticks.
With both Facts, we can TEST VALUES and look for a pattern...
IF....
carrots = 8, Brussel sprouts = 15, celery sticks = 5... then the answer to the question is 8:5.
carrots = 16, Brussel sprouts = 30, celery sticks = 10... then the answer to the question is 16:10 = 8:5.
carrots = 24, Brussel sprouts = 45, celery sticks = 15... then the answer to the question is 24:15 = 8:5.
The answer is always 8:5
Combined, SUFFICIENT
Final Answer:
CGMAT assassins aren't born, they're made,
Rich
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