There are six boxes containing 5 , 7 , 14 , 16 , 18 , 29 balls of either red or blue in colour. Some boxes contain only red balls and others contain only blue . One sales man sold one box out of them and then he says " I have the same number of red
balls left out as that of blue ". Which box is the one he solds out ?
Select Answer:
40
30
12
None of the above
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