How is 'came' written in the code language? I. 'we came by car' is written as '4 9 2 8' and 'can we buy car' is written as '5 8 0 2'. II. 'can car be cheap' is written as '8 1 5 3' and 'came by cheap car' is written as '9 8 4 1'.

Data sufficiency questions are designed to check your ability to analyse & categorise information based on underlying concepts rather than calculations. So you should try to observe -  analyse and to find linkages between various statements rather soing lengthy calculations.