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nik

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How far can you go?

simply replace tyre 1 by the spare tyre after 1mile then after total distance covered by the car is 2 miles then put the spare tyre (i.e the tyre which is spare now) in place of tyre 2 then do it similarly for tyre 3 and tyre 4

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Survivor

first find out the power of 2 nearest after 1500, then the ssurvivor will be=1500-(2048-1500-1) it can be understood by observing the pattern knights 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
survivor 1 1 3 1 3 5 7 1 3 5 7 9 11 13 15 1 3 5 7 the pattern is (2^n) knights -: 1 seat (2^n)-1 knights -: ((2^n)-1)-1 seat (2^n)-2 " -: ((2^n)-2)-2 seat . . . (2^(n-1)) knight -:1 seat i.e for n number of knights survivor is (n-((2^x)-n-1)) where 2^x is the power of 2 just after n

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