# Quest-Global placement paper set1

Posted on :01-04-2016

Q1. A three digit number consists of 9,5 and one more number . When these digits are reversed and then subtracted from the original number the answer yielded will be consisting of the same digits arranged yet in a different order. What is the other digit?

Solution:

Let the digit unknown be n.
The given number is then 900+50+n=950+n.
When reversed the new number is 100n+50+9=59+100n.
Subtracting these two numbers we get 891-99n.
The digit can be arranged in 3 ways or 6 ways.
We have already investigated 2 of these ways.
We can now try one of the remaining 4 ways. One of these is n 95
100n+90+5=891-99n
or 199n =796
so, n=4
the unknown digit is 4.

Q2. A  farmer built a fence around his 17 cows, in a square shaped region. He used 27 fence poles on each side of the square. How many poles did he need altogether?

ANS: 104 poles

Solution:

Here 25 poles Must be there on each side .And around four corners 4 poles will be present.
4*25+4=100+4=104 poles.

Q3. On the first test of the semester, kiran scored a 60. On the last test of the semester, kiran scored 75% By what percent did kirans score improve?

ANS: 25%

Solution:

In first test kiran got 60
In last test he got 75.
% increase in test ( 60(x+100))/100=75
0.6X+60=75
0.6X=15
X=15/0.6=25%

Q4. A group consists of equal number of men and women. Of them 10% of men and 45% of women are unemployed. If a person is randomly selected from the group. Find the probability for the selected person to be an employee.

ANS: 29/40

Solution:

Assume men=100,women=100 then employed men & women r (100-10)+(100-45)=145
So probability for the selected person to be an employee=145/200=29/40

Q5. Randys chain of used car dealership sold 16,400 cars in 1998. If the chain sold 15,744 cars in 1999, by what percent did the number of cars sold decrease?

ANS: 4%

Solution:

Let percentage of decrease is x , then
16400(100-x)/100=15744
16400-15744=164x
x=656/164=4%

Q6. A radio when sold at a certain price gives a gain of 20%. What will be the gain percent, if sold for thrice the price?

A) 260%
B) 150%
C) 100%
D) 50%
E) None of these

ANS: 260%

Solution:

Let x be original cost of the radio.
The solding price = (100+20)x=120x
If , it is sold for thrice the price ,then 3*120x=360x
So, gain percent is (360-100)=260%.

Q7. If the Arithmetic mean is 34 and geometric mean is 16 then what is greates number in that series of numbers?

ANS: 64

Solution:

Let two numbers be x, y;
Arithmetic mean=34=>( x+y)/2=34
x+y=68
geometric mean=16=>(xy)pow 1/2=16
xy=16*16=256
By trail and error 16*16=64*4
And 64+4/2=34
So the greatest number int hat series is 64.

Q8. The diameter of the driving wheel of a bus is 140cm. How many revolutions per minute must the wheel make in order to keep a speed of 66 kmph?

ANS: 250

Solution:

Distance to be covered in 1 min=(66*1000)/60 m=1100m
Circumference of the wheel =(2*22/7*0.70)m=4.4m.
So, Number of revolutions per min=1100/4.4=250.

Q9. The boys and girls in a college are in the ratio 3:2. If 20% of the boys and 25% of the girls are adults, the percentage of students who are not adults is:?

ANS: 78%

Solution:

Suppose boys = 3x and girls = 2x
Not adults = (80*3x/100) + (75*2x/100) = 39x/10
Required percentage = (39x/10)*(1/5x)*100 = 78%

Q10. Vivek travelled 1200km by air which formed 2/5 of his trip. One third of the whole trip , he travelled by car and the rest of the journey he performed by train. The distance travelled by train was?

ANS: 800km

Solution:

Let the total trip be x km.
Then 2x/5=1200
x=1200*5/2=3000km
Distance travelled by car =1/3*3000=1000km
Journey by train =[3000-(1200+1000)]=800km.

Q11. In a college ,1/5 th of the girls and 1/8 th of the boys took part in a social camp. What of the total number of students in the college took part in the camp?

ANS: 2/13

Solution:

Out of 5 girls 1 took part in the camp
out of 8 boys 1 took part in the camp
so, out of 13 students 2 took part in the camp.
So, 2/13of the total strength took part in the camp.

Q12. On sports day, if 30 children were made to stand in a column,16 columns could be formed. If 24 children were made to stand in a column , how many columns could be formed?

ANS: 20

Solution:

Total number of children=30*16=480
Number of columns of 24 children each =480/24=20.

Q13. Two trains 200mts and 150mts are running on the parallel rails at this rate of 40km/hr and 45km/hr. In how much time will they cross each other if they are running in the same direction.

ANS: 252sec

Solution:

Relative speed=45-40=5km/hr=25/18 mt/sec
Total distance covered =sum of lengths of trains =350mts.
So, time taken =350*18/25=252sec.

Q14. 5/9 part of the population in a village are males. If 30% of the males are married, the percentage of unmarried females in the total population is:

ANS: (250/9)%

Solution:

Let the population =x Males=(5/9)x
Married males = 30% of (5/9)x = x/6
Married females = x/6
Total females = (x-(5/9)x)=4x/9
Unmarried females = (4x/9 – x/6) = 5x/18
Required percentage = (5x/18 * 1/x * 100) = (250/9)%

Q15. From height of 8 mts a ball fell down and each time it bounces half the distance back. What will be the distance travelled

ANS: 24

Solution:

8+4+4+2+2+1+1+0.5+0.5+ and etc .. =24

Q16. First day of 1999 is Sunday what day is the last day

ANS: Monday

Q17. Increase area of a square by 69% by what percent should the side be increased

ANS: 13

Solution:

Area of square=x2
Then area of increase=100+69=169

square root of 169 i.e 13 .

Q18. Ten years ago, chandrawathis mother was four times older than her daughter. After 10years, the mother will be twice older than daughter. The present age of Chandrawathi is:

ANS: 20 years

Solution:

Let Chandrawathis age 10 years ago be x years.
Her mothers age 10 years ago = 4x
(4x+10)+10=2(x+10+10)
x=10
Present age of Chandrawathi = (x+10) = 20years

Q19. Finding the wrong term in the given series
7, 28, 63, 124, 215, 342, 511

ANS: 28

Solution:

Clearly, the correct sequence is
2^3 – 1, 3^3 – 1, 4^3 – 1, 5^3 – 􀏭, ……….
Therefore, 28 is wrong and should be replaced by (3^3 – 1) i.e, 26.

Q20. If a man walks at the rate of 5kmph, he misses a train by only 7min. However if he walks at the rate of 6 kmph he reaches the station 5 minutes before the arrival of the train. Find the distance covered by him to reach the station.

ANS: 6km.

Solution:

Let the required distance be x km.

Q21. Difference in the times taken at two speeds=12mins=1/5 hr.
Therefore x/5-x/6=1/5 or 6x-5x=6 or x=6km. Hence ,the required distance is 6 km

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