Answer : A
Explanation : Converting each letter to its numerical value, the diagram represents a subtraction sum: 247 – 54 = 193.
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Answer : T
Explanation : Starting on the top left, and moving in an anti-clockwise spiral towards the centre, letters advance through the alphabet by 3 letters at a time.
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Answer : W
Explanation : Looking at the diagram in columns, letters in the first column are written with 2 straight lines, in the second column they contain 3 straight lines, and letters in the right hand column are written with 4 straight lines.