Quantitative Aptitude Quiz for IBPS | RRB – Set 268

1) Rajiv has 14 currency notes in his pocket consisting of only Rs. 20 and Rs. 10 notes. The total money value of the notes is Rs. 230. The ratio of Rs. 10 notes to Rs. 20 that Rajiv has is:
a) 4/5
b) 1/6
c) 1/1
d) 5/9

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Answer Answer d) 5/9
Let the 20 rupees note be x and 10 rupees note be y.
From the question it is known that x+y = 14
And 2x + y =23.
X =9 and y= 5.
Ratio is 5/9.

2) Two cogged wheels of which one has 16 cogs and other 27, work into each other. If the latter turns 80 times in three quarters of a minute, how often does the other turn in 8 second?
a) 12
b) 26
c) 24
d) 30

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Answer Answer c) 24
By using chain rule
27*8*80 = x*45*16.
Then x= 24 times.

3) There are 35 students in a lecture of physics, in which the difference between the girls and boys is 5. The average of marks got by girls is 5 more than boys and the total marks got by boys are 50 less than girls. What is the average mark of total students?
a) 160/7
b) 150/9
c) 130/9
d) 190/9

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Answer Answer d) 190/9
Case 1: when boys> girls
Total student =35
Let no of boys be x then girls will be 35-x.
As given x = 35-x +5.
Then x = 20. Let total weight of boys and girls be A and B respectively.
Then A/15 + 5 = B/20, also A = 50 + B.
On solving we get a negative value which is incorrect, so this assumption is wrong.

Case 2: when boys< girls
Total student =35
Let no of girls be x then boys will be 35-x.
As given x = 35-x +5.
Then x = 20. Let total weight of boys and girls be A and B respectively.
Then A/20 – 5 = B/15, also B = 50 + A.
On solving we get average marks as 190/9

4) There are 45 students in a hostel. Due to the admission of 15 new students the expenses of the mess were increased by Rs. 60 per day while the average expenditure per head diminished by Re. 1. What was the original expenditure of the mess?
a) 675
b) 670
c) 360
d) 480

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Answer Answer c) 360
Let original average expenditure be y then
60 (y-1) – 45y = 60
The y= 8
The original expenditure is 8*45= 360.

5) The arithmetic mean of the scores of a group of students in a test of mathematics was 48. The brightest
20% of them secured a mean score of 75 and dullest 25% a mean score of 30. The mean score of the remaining 55% is:
a) 560/11
b) 56
c) 510/11
d) 670/11

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Answer Answer c) 510/11
Let the mean score be x.
20*75 + 25* 30 + 55*x =4800
On solving x= 510/11

6) 7,20,46,98,202,?
a)425
b)412
c)410
d)430

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Answer Answer c)410
Logic= +(13*1), +(13*2),+(13*4),+(13*8), +(13*16)

7)210, 209,213,186,202,?
a)77
b)152
c)356
d)150

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Answer Answer a)77
-(1^3), +(2^3),-(3^3)…..

8)27,38,71,126,203,?
a)326
b)458
c)302
d)278

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Answer Answer c)302
+(11*1),+(11*3),+(11*5),+(11*7)…

9)435,354,282,219,165,?
a)200
b)150
c)169
d)120

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Answer Answer d)120
-(9*9),-(9*8),-(9*7),-(9*6)….

10)4,200,369,513,634,?
a)734
b)1052
c)986
d)854

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Answer Answer a)734
+14^2,+13^2,+12^2,+11^2,+10^2….

Also Check Out Quantitative Aptitude Quiz for IBPS | RRB – Set 267


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