Quantitative Aptitude - what is the largest prime no. stored in 8bit/6bit/9bit/7bit memory?2. A,B,C are the mechanisms used

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Quantitative Aptitude | Question 28 of 45

what is the largest prime no. stored in 8bit/6bit/9bit/7bit memory?

2. A,B,C are the mechanisms used separately to reduce the wastage of fuel by 25%,20%,10%.what will be fuel economy if they were used combine? ans. 46

plzz give me the solution.

Total Answers and Comments: 3

Last Update: May 16, 2008 Asked by: sreetama dutta

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October 11, 2006 09:44:35

sirisha

RE: what is the largest prime no. stored in 8bit/6bit/...

here just u hav to do

for 8-bit 2^8 =256

251 is the largest prime num

for 6-bit 2^6 =64

61 is the prime num

for 7-bit 2^7=128

127 is the largest primeno

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February 22, 2007 07:53:07

sonalpriya

RE: what is the largest prime no. stored in 8bit/6bit/...

for 1st machine 100-25 ie 75
for 2nd machine 100-20 ie 80
for 3rd machine its 100-10 ie 95
so efficiency in rev = (90*80*75)/10000
=54
so fuel economy =100-54
=46

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May 16, 2008 08:38:49

arun_navgo

Member Since: May 2008 Contribution: 2

RE: what is the largest prime no. stored in 8bit/6bit/9bit/7bit memory?2. A,B,C are the mechanisms used separately to reduce the wastage of fuel by 25%,20%,10%.what will be fuel economy if they were used combine? ans. 46plzz give me the solution.

2. for this ques, suppose tat 100% wastage is thr..
using A, 25% is saved. now 75% is wastage..
using B, 20% is saved.. ie. 75*20/100=15... ie. 15part of tat 75 is saved..
so the wastage now will be 75-15=60..
using C,10% is saved..ie. 60*10/100=6.. 60-6=54..
finally by combinin A,B & C the wastage is 54.. the saved fuel(fuel economy) is 100-54=46

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