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Minimum Weighing Operations
If we have to weigh 31 kgs of rice using only 1 kg stone. What are the minimum number of weighing operations required?
fishpie_123
- Mar 2nd, 2011
5 weighing operations:Rice Counter weight==== ==============1kg (1kg stone)2kg (1kg rice + 1kg stone)4kg (1+2+1)8kg (1+2+4+1)16kg (1+2+4+8+1)================total: 31kg rice
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Pipes are laid by an oil company
Pipes are laid by an oil company. If the company has to lay down 3km of pipes and each pipe is 25 meters long, calculate and print the number of pipes needed to cober the distance
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600 to be seated. 10 benches are less. 2 more persons are required to be seated in each bench. How many benches.209364460
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Answered by: naveengupta
- Jun 26th, 2007
ans is 60 benches
let x=no of benches
y=no of students per bench
given
x*y=600,---------(1)
and given that 10 benches are less hence 2 students are seated more than per bench then
600=(x-10)*(y+2)
600=xy+2x-10y-20------------(2)
since xy=600
then eq(2) is
2x-10y=20
2x-10(600/x)=20
on solving
we get x=60prititripathi
- Feb 25th, 2011
Given a*b=600& (a-10)*(b+2)=600ab-10b+2a-20=600we knw ab=600so 2a-10b=202a-10*600/a=20solve quadratic eq. we get a=60 b=10
SAUREEN ADANI
- Jun 10th, 2010
10*60=60012*50=600it means per bench 10 student requirs 60 benches.but 10 are less so that on 50 benches to accomodate 12 per bench. it means 2 more to be seated on each bench. so the answer is 60.
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Find the next number in the series 3, 4, 6, 9, 13,?
Next number will be 18.This is fibonacci series X, X+1, X+2, X+3.....
prititripathi
- Feb 25th, 2011
Series is like dat difference b/w 3-4 is 0next one 1 ,2 n so onso next no. vll b 18
hmvasista
- Apr 29th, 2010
The answer is 18 ie 3+1=4 4+2=6 6+3=9 9+4=13so 13+5=18This is not a fibonacci series.... it is 0,1,1,2,3,5,8,13,21,34....
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Three independent mechanisms A,B and C have been incorporated for fuel saving in a car producing respectively 30%, 20%, and 40% efficiency. Assuming that they operate independently, what is the net fuel efficiency achieved?
prititripathi
- Feb 25th, 2011
Fuel saving 30%=100-30so total vll b=((100-30)*100-20)*(100-40))/100*100*10066.4
c.sindhureddy
- Feb 13th, 2010
Why are you subtracting it from 100?They gave us there efficiences right directly.Can you clarify me plz.
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If the circumference of a circle is 100 units, Then what will the length of the arc described by an angle of 20 degree?
prititripathi
- Feb 25th, 2011
Length of arc =angle/360 *circumferenceso (20/360)*100length of arc=50/9
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How to solve the $ and * problem. if $=1,*=0value 1 doubles and shift to left place.t(for ex:4=$**,3=$$)even i dont know the quetion properly. but the samepattren question appeared in cts too.pls expLCM(9,18,27)=
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Shwethascar- Member Since Jul-2008 | Jul 8th, 2008
lcm of 9,18,27 is 54
that can be represented as 110110 in binary
that's $$*$$*prititripathi
- Feb 25th, 2011
Lcm (9,18,27)=54convert it into binary u vll get 110110express it in $ * as =$$*$$*
Shwethascar
- Jul 8th, 2008
Lcm of 9,18,27 is 54that can be represented as 110110 in binarythat's $$*$$*
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Given d value of log 3.142 & log 3.143. to find the value of log 3.141
prititripathi
- Feb 25th, 2011
By applying log formula logm/logn=logm-lognn log(3.143)/log(3.142)=log.0001againlog(3.142-.001)=log 3.141
hmvasista
- Apr 29th, 2010
Log indentities are:log a - log b = log(a/b)log a + log b = log(ab)we can proceed by taking letlog 3.142 = x, so 3.142= 10^xlog 3.143 = y, so 3.143= 10^yand make appropriate substitutions....
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What is the last digit of 7291
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English and Telugu
In a class of 150 students 55 speak English; 85 speak Telugu and 30 speak neither English nor Telugu. 1. How many speak both English and Telugu?2. How many speak only Telugu?3. How many speak at least one of the two languages from English and Telugu?
raje243
- Feb 16th, 2011
Total=150English=55Telugu=85none/ neither English nor Telugu=30No. of Students who speak only one or both=150-30=120so, 120 stud's can speak english or telugu or both.then, No. of Stud's ...
pramodh holla
- Sep 28th, 2010
In the given question. n(e^t)=n(e)+n(t)-n(e or t)
n(e and t)=n - neither who speak English nor Telugu=150-30=>120.
n(e and t)=n(e)+n(t)-n(e or t)
120=55+85-n(e or t)
n(e or t)=20.
n(only Telugu)=n(t)-n(e or t)=85-20 = 65.
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Aptitude work days Question
Person A can complete the job in 10 days, Person B can complete the job in20 days. If both together work then in how many days they will finish d work ?
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Time Calculation
There are 4 women having walking speed as 1min, 2min, 4min, 5min. If one or two women can cross bridge at a time with flashlight, then what is min. time required for 4 women to cross bridge without using flashlight?
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9 Digit Numbers
How many 9 digit numbers are possible by using the digits 1,2,3,4,5 which are divisible by 4 if the repetition is allowed?
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Find the Poisoned Can
If there are 30 cans out of them one is poisoned if a man tastes very little he will die within 14 hours. Now mice are used to test in 24 hours, how many mices are required to find the poisoned can?
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Base Eight Numbering
The citizens of planet X are 8 fingered and have thus developed their decimal system in base 8. A certain street on planet X contains 1000 buildings numbered 1 to 1000. How many 3s are used in numbering these buildings?
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Aptitude Power Unit Question
A power unit is there by the bank of the river of 750 meters width. A cable is made from power unit to power plant opposite to that of the river and 1200mts away from the power unit. The cost of the cable below water is Rs.15/- per meter and cost of cable on the bank is Rs.12/-per meter. Find the total of laying the cablea. 15550 b. 15650 c. 16560 d. 16650 e. None of these
aishs8
- Jan 23rd, 2011
River width=750 mBank width=(1200-750)=450mCost of cable along river=750*15 =11250Cost of cable along bank=450*12=? 5400Total cost of cabling =11250+5400 = 16650
aishs8
- Jan 23rd, 2011
29 mice are required to test the cans.As the time constarint of 24 hours is mentioned, I think this is optimal.We can discard 30th can as even if one mice dies, we can find the poisoned can.
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A company gives out bonuses
A company gives out bonuses based on the amount of income generated by their sales representatives per month. Once the income generated is greater than or equal to $10,000 a bonus of 20% is given. If the income generated is greater than or equal to $8000 but less than $10,000 a bonus of 15% is given. If the income generated is greater than or equal to $5000 then a 3% bonus is given. Read the income...
Abinaya Roshini
- Jan 17th, 2011
For sales representative gaining income above or equal to 10000 the bonus will be 2000 and above,if income range between 8000 to 10000 the bonus will be a range of 1200 to1500,if income equal to or above 5000 the bonus will be 150 and above
yuviii
- Apr 24th, 2010
Let x be the income generated.if x>=10,000 then bonus is 2000Rs therefore the income left is 8,000.if x>=8,000 and <10,000 then bonus is 1,200Rs therefore the income left is 6,800.if x>=5000 then bonus is 150Rs therefore the income left is 4,850.
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Calculate and print the amount of money paid to each worker
A carpenter is paid a contract fee of $2000 for 3 days work. He hires 3 workers who work for 3 days at $75 a day. Calculate and print the amount of money paid to each worker, the total paid to each worker,the total paid to all workers and the amount the carpenter is left with.
Abinaya Roshini
- Jan 17th, 2011
The amount paid to each worker is 75 per day, total paid for each worker is 225, total paid for all workers is 675, the money left for carpenter is 1325.
levteck
- Sep 13th, 2010
Each worker get 3 times $75 for a total of $225 after three days3 workers were hired so total of all workers would cost $675the total contract was $2000 minus total labor cost $675 then $1325 remains to the carpenter.
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Find Possible Number of Combinations
There are A, B techers and C,D doctors. Find the possible no. of combinations that should not be repeated more than once?
manishkraasawat
- Jul 7th, 2010
There are 15 possible combination 4C1+ 4C2 + 4C3+ 4C4= 15One value missed is ACD in the above given 14 combinations.
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An INK bug starts jumping 1 meter to each direction north, south, east and west respectively. It marks a point in the new locations. It comes back to its original point after jumping in all directions. It again starts the same process from the newly drawn unique points. Totally how many points did the bug mark?
harini_src
- Jan 13th, 2011
It's 2.or 4.First north and then south,which is the origin.second east and then west,which is the origin again!If this process repeats then two moreSO the answer is either 2 or 4.
Aptitude Interview Questions
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