In a certain coding system, ‘how are you’ is coded as ‘639’, ‘are you fine today’ is coded as ‘6453’, STAY FINE as ‘58’. What Is the code for ‘today’ in this system ?

4

Given; In a certain coding system, ‘how are you’ is coded as ‘639’, ‘are you fine today’ is coded as ‘6453’,as ‘58’.

So,

 HOW ARE YOU  =  6 3 9

 ARE YOU FINE TODAY  =  6 4 5 3

 STAY FINE  =  5 8

=> Code for ARE is 3, YOU is 6, FINE is 5

So, the remaining word is TODAY and the remaining code is 4

Thus, code for TODAY is 4