Amazon - 2016 Aptitude Test Placement Papers
1. A student got twice as A student got twice as many sums wrong as he got right. If he attempted 48
sums in all, how many did he solve correctly? many sums wrong as he got right. If he attempted 48
sums in all, how many did he solve correctly?
a) 12
b) 16
c) 18
d) 24
Answer: b
Solution:
Suppose the boy got x sums right and 2x sums wrong. Then, x + 2x = 48 3x = 48 x = 16.
2. A man fixed an appointment to meet the manager, Manager asked him to come two days after the
day before the day after tomorrow. Today is Friday. When will the manager expect him?
a) Friday
b) Monday
c) Tuesday
d) Sunday
Answer: b
Solution:
Don\\'t confuse it with Tuesday.the correct answer
,is Monday
3. There is a merry-go-round race going on.One person says,"1/3 of those in front of me and 3/4 of
those behind me, give the total number of children in the race". Then the number of children took part
in the race?
a) 12
b) 11
c) 13
d) 14
Answer: c
Solution:
Assume there are x participants in the race. In a round race, number of participants in front of a
person wil be x-1 and that behind him wil be x-1. i.e, 1/3(x-1) + 3/4(x-1) = x solving x = 13
4. Find the value of X,Y and Z in the following
XXXX
YYYY
ZZZZ
.
YXXXZ
a) X=9 , Y=2; Z=8
b) X=9 , Y=1; Z=9
c) X=8 , Y=1; Z=8
d) X=9 , Y=1; Z=8
Answer: d
5. The smallest number which when diminished by 7, is divisible 12, 16, 18, 21 and 28 is?
,a) 1008
b) 1015
c) 1022
d) 1032
Answer: b
Solution:
Required number = (L.C.M. of 12,16, 18, 21, 28) + 7 = 1008 + 7 = 1015
6. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is?
a) 12
b) 16
c) 24
d) 48
Answer: d
Solution:
Let the numbers be 3x and 4x. Then, their H.C.F. = x. So, x = 4. So, the numbers 12 and 16. L.C.M. of 12
and 16 = 48.
7. 252 can be expressed as a product of primes as?
a) 2 x 2 x 3 x 3 x 7
b) 2 x 2 x 2 x 3 x 7
c) 3 x 3 x 3 x 3 x 7
d) 2 x 3 x 3 x 3 x 7
Answer: a
, Solution:
Clearly, 252 = 2 x 2 x 3 x 3 x 7.
8. 21, 9, 21, 11, 21, 13, 21, .
a) 14
b) 15
c) 21
d) 23
Answer: b
Solution:
In this alternating repetition series, the random number 21 is interpolated every other number into an
otherwise simple addition series that increases by 2, beginning with the number 9.
9. Two trains, one from Howrah to Patna and the other from Patna to Howrah, start simultaneously.
After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio
of their speeds is ?
a) 2 : 3
b) 4 : 3
c) 6 : 7
d) 9 : 16
Answer: b
Solution:
Let us name the trains as A and B. Then, (A\\'s speed) : (B\\'s speed) = b : a = 16 : 9 = 4 : 3.
boat against stream (Up stream), U = b - u It is given upstream time is twice to that of downstream.
1. A student got twice as A student got twice as many sums wrong as he got right. If he attempted 48
sums in all, how many did he solve correctly? many sums wrong as he got right. If he attempted 48
sums in all, how many did he solve correctly?
a) 12
b) 16
c) 18
d) 24
Answer: b
Solution:
Suppose the boy got x sums right and 2x sums wrong. Then, x + 2x = 48 3x = 48 x = 16.
2. A man fixed an appointment to meet the manager, Manager asked him to come two days after the
day before the day after tomorrow. Today is Friday. When will the manager expect him?
a) Friday
b) Monday
c) Tuesday
d) Sunday
Answer: b
Solution:
Don\\'t confuse it with Tuesday.the correct answer
,is Monday
3. There is a merry-go-round race going on.One person says,"1/3 of those in front of me and 3/4 of
those behind me, give the total number of children in the race". Then the number of children took part
in the race?
a) 12
b) 11
c) 13
d) 14
Answer: c
Solution:
Assume there are x participants in the race. In a round race, number of participants in front of a
person wil be x-1 and that behind him wil be x-1. i.e, 1/3(x-1) + 3/4(x-1) = x solving x = 13
4. Find the value of X,Y and Z in the following
XXXX
YYYY
ZZZZ
.
YXXXZ
a) X=9 , Y=2; Z=8
b) X=9 , Y=1; Z=9
c) X=8 , Y=1; Z=8
d) X=9 , Y=1; Z=8
Answer: d
5. The smallest number which when diminished by 7, is divisible 12, 16, 18, 21 and 28 is?
,a) 1008
b) 1015
c) 1022
d) 1032
Answer: b
Solution:
Required number = (L.C.M. of 12,16, 18, 21, 28) + 7 = 1008 + 7 = 1015
6. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is?
a) 12
b) 16
c) 24
d) 48
Answer: d
Solution:
Let the numbers be 3x and 4x. Then, their H.C.F. = x. So, x = 4. So, the numbers 12 and 16. L.C.M. of 12
and 16 = 48.
7. 252 can be expressed as a product of primes as?
a) 2 x 2 x 3 x 3 x 7
b) 2 x 2 x 2 x 3 x 7
c) 3 x 3 x 3 x 3 x 7
d) 2 x 3 x 3 x 3 x 7
Answer: a
, Solution:
Clearly, 252 = 2 x 2 x 3 x 3 x 7.
8. 21, 9, 21, 11, 21, 13, 21, .
a) 14
b) 15
c) 21
d) 23
Answer: b
Solution:
In this alternating repetition series, the random number 21 is interpolated every other number into an
otherwise simple addition series that increases by 2, beginning with the number 9.
9. Two trains, one from Howrah to Patna and the other from Patna to Howrah, start simultaneously.
After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio
of their speeds is ?
a) 2 : 3
b) 4 : 3
c) 6 : 7
d) 9 : 16
Answer: b
Solution:
Let us name the trains as A and B. Then, (A\\'s speed) : (B\\'s speed) = b : a = 16 : 9 = 4 : 3.
boat against stream (Up stream), U = b - u It is given upstream time is twice to that of downstream.
