Answer Key for Postal
Assistant/Sorting Assistant Exam held on 12 May 2013- Mathematics Section

__Mathematics Section Solved__

Q1. If the digits of a two digit number are
interchanged, the newly formed number is more than the original number by 18.
If the sum of the digits is 8, then what was the original number?

(A) 26

(B) 17

(C) 35

(D) Data inadequate

**Ans. (C) 35**

Q2. One year ago, a mother was 4 times
older than her son. After 6 years, her age becomes more than double her son’s
age by 5 years. The present ration of their age will be:

(A) 17:2

(B) 25:7

(C) 29:6

(D) None of these

**Ans. (B) 25:7**

Q3. If m:n is 2:3, what is the value of
(2m+5n)/(6m-n):

(A) 5/3

(B) 7/3

(C) 3/7

(D) None of these

**Ans. (B) 7/3**

Q4. A triple successive discount of 20%,
10% and 5% is equal to a single discount of :

(A) 31.60%

(B) 25.7%

(C) 40%

(D) 35%

**Ans. (A) 31.60%**

Q5. Three items are purchased at Rs.380/-
each. One of them is sold at a loss of 10%. The others are sold so as to
gain25% on the whole transaction. What is the gain % on these two items?

(A) 42.5%

(B) 40.5%

(C) 44.5%

(D) None of these

**Ans. (A) 42.5%**

Q6. The size of a bag that could hold 6 Kg
of oranges has now been increased so that it can hold 8 kg. What is the percentage
increase in the size?

(A) 30 1/3 %

(B) 33 1/3%

(C) 20%

(D) 25%

**Ans. (B) 33 1/3%**

Q7. If w/x=6/11, y/z=16/23, w/y=9/6 then
what is the value of x/y?

(A) 13/16

(B) 11/16

(C) 6/16

(D) None of these

**Ans. (D) None of these**

Q8. What approximate value should come in
place of (?) in the following question?

(A) 8

(B) 10

(C) 53

(D) None of these

**Ans. (B) 10**

Q9. Mid points of the side of an
equilateral triangle of side 18 cm are joined to form another triangle, whose
midpoints are further joined to form a different triangle and this process is
repeated indefinitely. The sum of the perimeters of all triangle will be:

(A) 144cm

(B) 172cm

(C) 72cm

(D) 108cm

**Ans. (D) 108cm**Hint: use GP

Q10. A sum of Rs.8500/-is to be divided
among 5 men, 6 women and 8 boys in the ratio of 10:7:1. The share of 01 boy
will be:

(A) Rs.595/-

(B) Rs.850/-

(C) Rs.85/-

(D) None of these

**Ans. (C) Rs.85/-**

Q11. Ram and Shyam work in the same
factory. Ram can produce 45 articles in one hour and Shyam can produce 40
articles in 0ne hour. During one week Shyam worked 5 more hours than Ram but
produced same number of articles as Ram. How many hours did Ram work that week:

(A) 50

(B) 43

(C) 45

(D) 40

**Ans. (D) 40**

Q12.

(A) 3/4

(B) 5 ¼

(C) 1

(D) 1 1/3

**Ans. (C) 1**

Q13. Which of the following numbers has got
the highest value?

(A) 127/25

(B) 121/9

(C) 53/4

(D) 25/6

**Ans. (B) 121/9**

Q14. The average score of Sachin Tendulkar
in IPL 15 matches is 70 runs and the average score in Border-Gavaskar T-20
matches is 45 runs in 7 matches. If he has played 10 more International T-20
matches and his overall average score in all T-20 matches was 73 runs. What was
his total score in 10 International T-20
matches:

(A) 971

(B) 982

(C) 990

(D) None of these

**Ans. (A) 971**

Q15. Number of diagonals in a 30 sided
convex polygon will be:

(A) 818

(B) 378

(C) 405

(D) 955

**Ans. (C) 405**

Q16. Two trains leave stations P and Q,
110km apart. Train from P to Q travels at 25Km/hr and train from Q to P at
30Km/hr. If they both start at 8 AM, they meet at:

(A) 09:00Am

(B) 09:45 Am

(C) 10:40Am

(D) None of these

**Ans. (D) None of these**

Q17. A sphere of radius x is melted and its
volume is divided into two equal parts. One part is cast into a cylinder of
height 10cm and second a cone of same height. The ratio of cylinder radius to
the cone radius is:

(A) 1:3

(B) √3:2

(C) 1:√3

(D) None of these

**Ans. (C) 1:√3**

Q18. A man buys milk at a certain price per
Kg. and after mixing it with water sells it again at the same price. How many
grams of water he mixes in every Kg. of milk if he makes a profit of 25%:

(A) 150g

(B) 30g

(C) 250g

(D) 200g

**Ans. (C) 250g**

Q19. A sum of Rs.8000 generates Rs.1261 as
compound interest in 03 years, interest being compounded annually. The rate of
compound interest is:

(A) 10%

(B) 5%

(C) 20%

(D) 2.5%

**Ans. (B) 5%**

Q20. By how much is two-thirds of 96 less
than three fifths of 210?

(A) 114

(B) 62

(C) 206

(D) None of these

**Ans. (B) 62**

Q21. If √.00000676 = .0026, then the square
root of 67,60,000 is:

(A) 260

(B) 2600

(C) 1/26

(D) 26

**Ans. (B) 2600**

Q22. The average temperature of three days
is 24˚C. If the temperature on first two days is 20˚ and 25˚C respectively,
then temperature on third day is:

(A) 27˚C

(B) 24˚C

(C) 22 ½˚C

(D) 23˚C

**Ans. (A) 27˚C**

Q23. A five-year cash certificate with a
maturity value of Rs.300 is purchased for Rs.200. The annual rate of simple
interest is:

(A) 10%

(B) 15%

(C) 5%

(D) 7 ½ %

**Ans. (A) 10%**

Q24. You bought some apples. On the first
day you ate one and ¼ of the reminder. On the second day you ate 2 and ¼ of the
remainder. On the third day you ate the entire remaining balance of 3. How many
apples did you buy?

(A) 13

(B) 19

(C) 9

(D) None of these

**Ans. (C) 9**

Q25. Two card start from place A and B,
100km apart, towards each other. Both card start simultaneously. A bird sitting
on one car starts at the same time towards the other car, and as soon as it
reaches the second car, it flies back to the first carand it continues in the
manner flying backwards and forwards from one car to the other, until the cars
meet. Both cars travel at speed of
50Kmph and the bird flies at 100kmph. Total distance covered by the bird will
be:

(A) 100km

(B) 200km

(C) 50km

(D) None of these

**Ans. (A) 100km**

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*** Comment if there is discrepancy in answers to any questions.**

qus 11.40hours is the time he wrk plus 5 hours he wrkd more.so 45 cud b the answr.

ReplyDeletequs no 8.answr s 10 na?hw cud it b 53?pls solve

ReplyDeletePlease check the answer of ques no. 8.... I think the right answer is B. 10

ReplyDeletei think ans for qstn no. 25 and 10 is d.

ReplyDeleteanswer of ques no 8 is surely 10. use a calculater

ReplyDeleteQuestion num 10. Right answer is 59, its not in the option. So none of these D

ReplyDeletepls upload the key of remaining two sections. thanks for your help.

ReplyDeleteques no:10 answer is 59..

ReplyDeleteYes...question no:10...i'm also getting the ans as d) none of these....

ReplyDeletei think answer 85 is correct

Deletehow?

Deletebut how come it is 85???

Deletei think answer for ans 10 is 85 itself. it is the correct answer.

ReplyDeletei have scored 76 marks in the exam as per the available key. any chances for selection?

ReplyDeleteyes there is chance for selection

DeleteIn which category do u belong to???

Deletei belong to OBC..

DeleteI got above 10 marks in maths section as per the key given here.Also I got 10 marks in all other sections.Is there any chance for me??

ReplyDeleteplz upload the key of english section ,i have scored 47 marks from 3 section each 14,12,21 is there is any chance for me

ReplyDeletei got 70 marks in total whether ter is possibility for me to select in obc category

ReplyDeletei got 75 marks and i come under general category...

ReplyDeleteis there any hope???

hey guys...pls tell ur score...

ReplyDeletei have scored 92 as per key.

Delete92??so job is sure for u..... :)

Deletewill +2 mark will be considered i have 93%

Deletei think no.....only apti marks vl b considered....

Deletehow much is your apti mark as per the key given above??

i got 92 mark as per key

Deletek..you vl get the job for sure....

Deletethank you.but i can"t join because i have got selection for other job

Deleteoh k....congrats!!!!wat job u got selected for??

Deletegot selection as army officer( women entry).

Deletecool...and u belong to which circle??

Deletei think you are asking about postal assistant circle.i belong to kerala circle. have you written postal assistant exam??? any hope

Deleteyeah!!! i also belong to kerala circle....i have written and score is 78.don't know whether to hope or not :)

Deletei think you have more probability for selection.work hard in speed typing (computer).practice a lot and achieve the goal.may god bless you......

Deletehow this test would be??i have no clue....is it typing a passage or what??

Deleteand also how many candidates would they call for this test??is there a good chance for me to be called for this?

i got 78 marks...and i'm in general category..

ReplyDeleteany chance for me??

I got 70 marks (kerala circle). In general category. Any hope to be included in the list?

ReplyDeleteI got 58 marks totally is there any chance for me?

ReplyDeletebecoz the qualifying mark is 10 marks in each part is 10 marks in each part.i have 10 marks in every part.But total is 58

I got 51 marks totally is there any chance for me?

ReplyDeletebecoz the qualifying mark is 10 marks in each part is 10 marks in each part.i have 10 marks in every part.But total is 51

Any one know the eligible criteria???

ReplyDeletepls rply me...

number doesn't get you job you are now just eligible for typing & data entry test ...and i can assure you that's quite a tough deal

ReplyDeletei got 78 marks...and i'm in general category,kerala..

Deleteany chance for me??

Is typing test is very tough????????????????

ReplyDeleteno idea....

Deletei got 58 mark if there is any chance for me

ReplyDeleter u in which category???

Deletewhen did the results come?????????

ReplyDelete