Latest UPSC Aptitude Question SOLUTION: Six identical cards are placed on a table. Each card has number '1' marked on one side and number '2' marked on its other side. All the six cards are placed in such a manner that t

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(#M40039421) UPSC Logical Reasoning question UPSC CSAT-2 Keep an EYE

Six identical cards are placed on a table. Each
card has number '1' marked on one side and
number '2' marked on its other side. All the
six cards are placed in such a manner that the
number '1' is on the upper side. In one try,
exactly four (neither more nor less) cards are
turned upside down. In how many least
number of tries can the cards be turned
upside down such that all the six cards show
number '2'on the upper side ?
(a) 3
(b) 5
(c) 7
(d) This cannot be achieved

Asked In UPSC SUDHIR SHARMA (9 years ago)

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