Coding Decoding

6 )

If D = 4 and COVER = 63, then BASIS = ?

7 )

In a given code SISTER is coded as 535301. UNCLE as 84670 and BOY as 129. How is RUSTIC written in that code?

8 )

In a certain code, 15789 is written as XTZAL and 2346 is written as NPSU. How is 23549 written in the code?

9 )

If wall is called window, window is called door, door is called floor, floor is called roof and roof is called ventilator, what will a person stand on?

10 )

In a certain code language, ‘po ki top ma’ means ‘Usha is playing cards’. ‘kop ja ki ma’ means ‘Asha is playing tennis’, ‘ki top sop ho’ means ‘they are playing football’ and ‘po sur kop’ means ‘cards and tennis’. Which word in that language means ‘Asha’?