GATE 2022 BM – Question 5
A palindrome reads the same forwards and backwards. The player has the two letter plates shown. Which additional set permits a five-letter palindrome using every plate exactly once? Plates may be rotated in their own plane.

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Correct answer: (B) Set B
Explanation
The original plates show A and D. In B the upside-down A can be rotated into A and the upside-down R into R. Together the five letters are A,D,R,A,R, which can be arranged RADAR. They have the two matching pairs needed for a five-letter palindrome. Thus B.
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