TS Police SI Mains 2018 Arithmetic and Reasoning

Question 173

If the code for A is 1, that of B is 3, that of C is 5,..., then the code for G is

Solution

Every alphabet's code is given by:
Numeric code = 1 +(n-1)*2 where n = chronological position of alphabet in the 26-alphabet system

G is 7th alphabet
Hence, its numeric code = 1 + 12 = 13

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