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If ABCD is related to ZYXW, how is EFGH related?
VUTS
WUTS
VU ST
UTSV
VUTS
Recognize reverse alphabet alphabetical mapping where each letter is replaced by its opposite counterpart from the back of the alphabet (A to Z, B to Y, etc.).
Recognize reverse alphabet alphabetical mapping where each letter is replaced by its opposite counterpart from the back of the alphabet (A to Z, B to Y, etc.).
Analyze the relation between ABCD and ZYXW
A is the 1st letter from the start and Z is the 1st from the end. B is 2nd from the start and Y is 2nd from the end. This is a complete reverse alphabet mapping (A < → Z, B < → Y, C < → X, D < → W).
Apply the reverse rule to EFGH
1: E (5th from start) maps to V (5th from end). 2: F (6th from start) maps to U (6th from end). 3: G (7th from start) maps to T (7th from end). 4: H (8th from start) maps to S (8th from end). The resulting word is VUTS.
B: WUTS is incorrect because E maps to V, not W. C: VU ST is incorrect due to incorrect spacing and letter sequence. D: UTSV is incorrect because the order of letters is reversed from the correct mapping.
A is correct because EFGH undergoes direct reverse alphabetical mapping where E becomes V, F becomes U, G becomes T, and H becomes S, resulting in VUTS.
Always write down the A-Z forward and backward index numbers (A=1/Z=26) quickly on your rough sheet during exam start to solve reverse coding questions in under 10 seconds.