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The citizzens of planet oz are 8 fingered and thus habve developed a number system in base 8. A certain street in Oz contains 1000 buildings nubered from 1 to 1000. How many 4s are used in numbering these buildings ? Express your answer in base 10.
64
96
192
256
Read Solution (Total 3)
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- 64+64+64=192.......bcoz upto 100 there will be 64.For 100 there will be 64.In unit 64 so 192
- 13 years agoHelpfull: Yes(5) No(3)
- in base there are only nos from 0-7
so totally,192 fours.
is there any easy way apart from counting? - 13 years agoHelpfull: Yes(4) No(0)
- sorry is it 252. i got there are 252 4s in 1-1000 according to base 8.
- 13 years agoHelpfull: Yes(0) No(5)
TCS Other Question
45 people {a1, a2,....,a45} meet and shake hands in a circular fashion. In other words, there are totally 45 handshakes involving the pairs, {a1, a2}, {a2,a3},....{a44,a45},{a45,a1}. Then the size of the smallest set of people such that the rest have shaken hands with at least one person in the set is
16
22
15
14
Ferrari S. p.A is an italian sports car manufacturer based in Maranello, Italy. Founded by Enzo Ferrari in 1928 as Scuderia Ferrari, the compay sponsored drivers and manufactured race cars bvefore moving into production of street-legal vehicles in 1947 as Ferrari S.p.A through out is history the compay has been noted for its continued participation in racing, especially in Formula One, where it has enjoyed great success. Rohit once bought a Ferrari. It could go 4 times as fast as Mohit’s old Mercedes. If the speed of Mohit’s Mercedes is 32 km/hr and the sistance traveelled by the Ferrari is 991 km, find the total time taken for Rohit to drive that distance
7.74 Hours
247 Hours
8 Hours
30 Hours