puzzles quantitative aptitude test

Online aptitude test questions and answers for company exam

Question 11 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
A five digit number has all non-zero different digits & decreasing arranged. Average of all the digits of the numbers is 5. The difference of number and the number formed by reversing the order of digits is 84942. Sum of all such possible digits are
A
195602
B
196002
C
196052
D
195588
Question 11 Explanation: 
Let number is 10000x+1000y+100z+10a+b
Where x not= y not= z not= a not= b not= 0
On reversing digits, we get the new number
10000b + 1000a + 100z + 10y + x
Difference
9999x + 990y - 990a - 999b
= 9999(x-b) + 990(y-a) = 84942
only possible case x-b = 8
so y-a = 5
if x-b = 8
x = 9, b = 1 (Only possibility)
and y-a = 5
(y, a)
(8, 3) and (7, 2)
So two possible case
x=9 y=8 z=? a=3 b=1 ---------(1)
and x=9 y=7 z=? a=2 b=1 -----(2)
Since average of digit = 45
so z=4 in (1) and z=6 in (2)
So number are
98431
97621
Sum = 196052







Question 12 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
What is the next number of the following sequence 12, 132, 1452, 15972, .....
A
16141692
B
16419162
C
16146192
D
16146152
Question 12 Explanation: 
12
1 (1+2) 2 = 1 3 2 = 132
1 (1+3) (3+2) 2 = 1 4 5 2 = 1452
1 (1+4) (4+5) (5+2) 2 = 1 5 9 7 2 = 15972
Similarly
1 (1+5) (5+9) (9+7) (7+2) 2 = 1 6 14 16 9 2 = 16141692

Question 13 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
A dinner party is to be fixed for a group consisting of 100 persons. In this party, 50 person do not prefer Veg, 60 prefer Non-veg and 10 do not prefer either Non-veg or Veg. The number of persons who prefer both Veg and Non-veg is
A
20
B
50
C
35
D
40






Question 14 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
A sum fetched a total simple interest of Rs. 453 at the rate of 6% p.a. in 5 years. What is the sum?
A
Rs 1024
B
Rs 1450
C
Rs 1510
D
Rs 1475
Question 14 Explanation: 
SI = PRT/100
P= SI*100/RT = 453*100/5*6 = 1510
Question 15 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
The detail of a class test are as given below Marks -- No of Student 2 --------- 4 3 --------- 7 4 --------- 10 5 --------- 15 6 --------- 8 7 --------- 5 8 --------- 1 average marks of the class will be
A
5
B
5.1
C
4.7
D
4.5
Question 15 Explanation: 
Sum of all student marks = 235
Total student = 50
So average marks = 235/50
= 4.7







Question 16 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
Total number of methods of selecting 6 cards out of 10 different cards is, X and total number of methods of selecting 6 cards out of 10 similar cards is y. Difference of x and y is
A
59
B
209
C
0
D
60
Question 16 Explanation: 
Total number of methods of selecting 6 cards out of 10 different cards is
10*9*8*7*6*5/6*5*4*3*2*1 = 210
And total number of methods of selecting 6 cards out of 10 similar cards is only 1
Difference is 209
Question 17 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
The % obtained by a student is 74. If we take % on the basis of 4 subjects (leaving the marks of fifth subject) then % is 76. How many marks, he got in the fifth subject.
A
66
B
58
C
59
D
69
Question 17 Explanation: 
74*5 = 370
76*4 = 304
so his marks in fifth subject = 370-304 = 66






Question 18 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
The sum of 3 even positive integers is 16. If greatest integer is 5 times the least. Then product of the 3 integers will be
A
80
B
60
C
90
D
40
Question 18 Explanation: 
since greatest number is 5 times the least one so least will definitely be 2 and greatest 10, on this basis last one number will be 4
so product = 80
Question 19 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
Find two numbers such that one third of greater exceeds one half on the lesser by 1, and one fifth of the greater added to one sixth of the lesser equals one half of the lesser.
A
30, 18
B
28, 12
C
32, 16
D
15, 9
Question 19 Explanation: 
Now, according to question
(1/3)x=(1/2)y+1 (let larger no, X smallest no y)
and (1/5)x+(1/6)y=(1/2)y
On solving (i) and (ii), we get x=30 and y =18






Question 20 ->Click on any option to know the correct answers (सही उत्तर जानने के लिए किसी भी Choice पर क्लिक करें)
The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Re. 48. The sum is:
A
7250
B
None of these
C
7500
D
5625
Question 20 Explanation: 
Given that difference between compound interest and simple interest is Rs.48
= > 48 = P(4/100)^2
= > 48 = P(1/25)^2
= > 48 = P(1/625)
= > P = 30000
There are 20 questions to complete.

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