Puzzles - Logical puzzles

Answer : B
Explanation : In each row of the diagram, the reverse alphabetical value of the central letter equals the sum of the left and right hand digits.

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Answer : G
Explanation : Convert each letter to its numerical value, and read each pair of values as 2 digit numbers. In each row, the number in the centre equals the difference between the 2 digit values on the left and right.

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Answer : Y
Explanation : Start in the top left hand corner and move anti clockwise around the perimeter of the square. Letters are written in alphabetical order, skipping 1 letter, then 2 letters, then 3 etc.

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