AP ICET 18 Sep 2021 Shift 1 Paper

Question Numbers : (61 to 65)
In a certain code. the letters of the English alphabet A,B,C,.......Z are given numbers 1,2,3,......,26 respectively. Then nth letter is coded as rth letter, where 1≤r≤26 and 1∕n ≡r(mod‌26)(that is 26 divides 1∕n−r ). For example 9th letter I is coded as 21st‌letter‌U, since 99 ≡21 (mod 26). For decoding reverse process is used. Based on this, answer questions 61 to 65 .