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1 Rs 675 amount to Rs 837 in four years at simple
interest . If the interest rate is decreased by 2 % then
amount will be
A 729 b 753 c 763 d 783
S I for four years 837-675= 162
Actual interest rate is 6 % if 2 % is decreased ie 4 %
Then amount is 783/-
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2 What least number which must be added to 1056 so that the sum is completely divisible by 23?
A 3 b 18 c 2 d 21
23) 1056 (45
92
---
136
115
---
21
---
Required number = (23 - 21)
= 2.
Answer c 2
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3 In a school with 600 students , the average age of
the boys is 12 years and that of girls is 11 years . if
the average age of the school is 11 years and 9 months then
the number of girls in the school is
A 450 b 250 c 150 d 350
Let the number of Girls be X Then number of boys = (600-x)
(11 4/3 * 600 )= 11 x 12 (600-x)
X=7200-7050 =150
Answer c 150
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4 Ram bought a cycle and sold it for Rs 4550 which is
30 % more than this original price . What is the original
price of the cycle
A 3500/- b 3800/- c 3600/= d 3400/-
Let cost price (C.P.) = 100.
Profit = 30 %. Selling price (S.P.) = (100 + 30) = 130. If selling price (S.P.) is 130, then cost price (C.P.) is 100. If selling price (S.P.) is 1, then cost price (C.P.) is $ (100/130). If selling price (S.P.) is 4550, then cost price (C.P.) is (100 /130 × 4550) = 3500Answer A 3500/- |
5 Rahim sales a cow at a loss of 15 % . if he has
sold it for Rs 150 more than he would have made a profit of
10 % . Cost price of the cow was
A 660 b 600 c 575 d None of these
None of these
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6 There are some parrots and some tigers in a forest
. if the total number of animal heads in the forest are 858
and total number of animal legs are 1746 . What is the
number of parrots in the forest
A 843 b 847 c 800 d None of these
Let the no of parrots is assumed as X
Total number of animals = 858
Total tigers = 858-x
Total legs = 2x=4(858-x)=1746
=2x+3432-4x=1746
2x=3432-1746=1686
X=1686/2=843
Answer a 843
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7 LCM of 36 , 45,52, 108 and 236 is a
A 414180 b 480414 c 441180 d none of these
36 = 2*2*3*3*
45 = 3*3*5 52 = 2*2*13 108 = 2*2*3*3*3* 236 = 2*2*59 Therefore, L.C.M of 36, 45, 52, 108, 236 = 2*2*3*3*3*5*13*59 = 414180
Answer a 414180
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8 Salaries of Akash , Babloo and chintu are in the ratio
of 2:3:5 . If their salaries were increased by 15 % , 10 %
and 20 % respectively
What will be the new ratio of their salaries
A 3:3:10 B 23:33:60 C 20:22:40 D None of these
Let Akash = 2 Babloo = 3 and Chintu = 5
Then 100/115=2 = 23/10
100/110=3 = 33/10
120/100=5= 6
Then new ratio is 23/10 :33/10: 6 = 23:33:60
Answer b 23:33:60
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9 A man earns Rs 20 on the first day and spends Rs 15
on the next day . He again earns rs 20 on the third day
and spends rs 15 on the fourth day . if he continues to
save like how soon will have Rs 60 in hand
A on 30 the day b On 40th Day c On 27th Day D On 17th day
Explanation: Money earned in 2 days = Rs.(20 - 15)
= Rs. 15. Money earned in 16 days = Rs.(5/2 x 16) ‹=›Rs. 40. On 17th day, money in hand = Rs.(40 + 20 ) = Rs. 60.
Answer d 17th Day
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10 Ajay can do a piece of work in 25 days and Sanjay can
finish it in 20 days . They work together for 5 days and
Ajay goes away . In how many days will Sanjay finish the
remaining work
A 11 days b 12 days c 14 days d None of these
Answer a
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11 The decimal representation of a rational number is
A Always terminating b Either terminating or repeating c Either terminating or non repeating
Answer b
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12 A hemispherical bowl of internal radius 9 cm
contains a liquid , The liquid is to be filled into
cylindrical shaped small bottles of diameter 3 cm and height
4 cm . How many bottles will be needed to empty the bowl
A 45 b 54 c 35 d 48
Radius of hemisphere= 9 cm
volume of hemisphere= 2/3 π r3
= 2/3 x9x9x9 π
= 486 π
radius of cylindrical shaped bottles= 3/2 cm
height= 4 cm
volume of bottles= π r2h
= 3/2x 3/2 x 4 π
=9 π
now,
Reaquired no. of bottles= volume of hemisphere/ volume of bottles
. =486 π/9π
. =54
Hence, no. of bottles required to empty the bowl = 54
Answer b 54
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13 If the numerator of a fraction is increased by 200
% and the denominator is increased by 300 % the resultant
fraction is 6/11 . What was the original fraction .
A 5/11 b 7/11 . c 8/13 d 8/11
If numerator increase 200 % then Numerator will be x+2x =3x
and denominator increased by 300% means denominator will be y = 3y =4y new fraction will be 3x/4y =6/66 (g
3x/4y = 6/11
dividing numerator by 3 and denominator by 4 both side we will get x/y =6/3/11/4 x/y=6x4/11x3 x/y =24/33 x/y =8/11 Answer d 8/11 |
14 If the ratio of areas of two squares is 9:1 the ratio of perimeter is
A 3:1 b 1:2 c 3:2 d None of these
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15 40 Laourers can handle a task of debri clearance in 7
days . if 5 % of the labourers leave after 2 days . What
is the total number of days the task will take
A 5 5/19 b 5 ½ c 5 7/8 d 5 8/19
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16 If eggs are bought at 10 for Rs 8 and sold at 4 for Rs 5 the business result in
A 50 % loss b 56 1/3 % gain c 51 % gain d 56 ¼ % gain
Answer 56 ¼ % gain
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17 A fruit seller buys lemons at 2 for a rupees. His gain percent is
A 10 % b 15 % c 20 % d 25 %
Answer 20 %
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18 A car is moving with a speed of 36 km/h . How much time
in seconds it will take to cross a 500 m long bridge .
A 40 b 45 c 50 d 55
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19 Two cars start from the same point at 8 am . In the
same direction . The speed of the first car is 60 km/h and
the speed of second car is 55 km/h . The distance between
them at 2 p. m on the same day is
A 20 km b 25 km c 28 km d 30 km
Answer b 25 KM
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20 The distance between two cities A and B is 520 km .
One car starts from city A towards city B with the speed
of 60 km/h. At the same time another car starts from city B
towards city A with a speed of 70 km/h . After how many
hours they will cross each other
A 3 hours b 4 Hours d 5 hours d 6 hours
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21 A car towards 90 km in first hour , 60 Km in second
hour and 43 km in third hour . The average speed of the car
is
A 43 KM/h b 50 KM/h c 51 KM/h 55 KM/h
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22 A car travels a distance of 150 km in a hours and next
242 km in 4 hours . The average speed of car for complete
journey
A 50 km/h b 55.25 km/h c 56 km/h d 58 km/h
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23 If the diagonals of a rhombus are of measure 12 cm and 16 cm . then this measure of its side is
A 10 cm b 20 cm c 15 cm d 96 cm
12/2 cm = 6 cm and 16/2 cm = 8 cm long.
Answer a 10 cm
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24 A watch was sold at a profit of 15 % . If its cost
had been 5 % less and it had been sold for Rs 21 less ,
then the profit would have been 10 % . Find the cost price
of the watch \
A 200 b 400 c 190 d None of these
None of these
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25 60 % of the students in a school are boys . if the
number of girls in the school is 300. Then the number of
boys is
A 500 b 300 c 450 d 750
If 60% are boys, then 40% must make up the girls.
Let x = total number of students
then .40x = 300 x = 300/.40= 7.5*100=750
750-300=450
Total no of boys 450
Answer c 450
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Prepared by s jayachandran , System Administrator , Mavelikara Head Post office , 690101
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Tuesday, 17 September 2013
Solved Questions - LGO Exam held on dated 15.09.2013
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