CAT Exam

if "test is tuff" stands for "@ # $","test was easy' stands for "$ % ^', "easy becomes tuff' stands for '^ @ &', then what will be code for 'is' and 'was'?

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CAT Other Question

consider the sequence of numbers a1,a2,a3....to infinity where a1=81.33 and a2=-19 and aj=(aj-1)-(aj-2).what is the sum of first 6002 terms of this sequence The number of ways in which a mixed double tennis game can be arrenged amongst 9 married couples if no husband and wife play in the same game is