Dear Aspirants, Our IBPS Guide team is providing new series of Quantitative Aptitude Questions for RRB PO Prelims 2021 so the aspirants can practice it on a daily basis. These questions are framed by our skilled experts after understanding your needs thoroughly. Aspirants can practice these new series questions daily to familiarize with the exact exam pattern and make your preparation effective.
Wrong number series
Directions (01-05): Find out the wrong number in the following number series.
1) 2, 27, 224, 1575, 9452, 47285
A.27
B.47285
C.9452
D.224
E.1575
2) 36, 54, 132, 472.5, 2126.25, 11694.375
A.472.5
B.132
C.11694.375
D.2126.25
E.54
3) 11, 31, 151, 1049, 9422, 103643
A.151
B.31
C.103643
D.9422
E.1049
4) 342, 727, 1328, 2193, 3370, 4905
A.4905
B.727
C.2193
D.3370
E.1328
5) 456, 429, 365, 240, 20, -319
A.365
B.20
C.-319
D.456
E.429
Pie chart
Directions (06-10): Study the following information carefully and answer the questions given below.
The given pie chart shows the percentage of car manufactured in five different companies.
The given table shows the ratio of the sold to unsold cars of five different companies.
6) If the ratio of three different colors of cars Red, Blue and Pink sold in C and E is 3:2:1 and 3:4:2 respectively, then what is the difference between the number of blue cars sold in C and the number of Pink cars sold in E?
A.20
B.30
C.40
D.50
E.60
7) What is average number of cars sold in all the companies together?
A.2484
B.2498
C.2528
D.2520
E.2568
8) What is the ratio of the number of cars unsold in C and A together to the number of cars unsold in E and D together?
A.8:9
B.10:11
C.11:12
D.12:13
E.7:8
9) What is the difference between the number of unsold cars in B and D?
A.10
B.30
C.40
D.60
E.None of these
10) The number of sold cars in C is what percent of the total number of cars manufactured in all the companies together?
A.10%
B.12.56%
C.14%
D.18%
E.22.22%
Answers :
1) Answer: C
2 * 9 + 9 = 27
27 * 8 + 8 = 224
224 * 7 + 7 = 1575
1575 * 6 + 6 = 9456
9456 * 5 + 5 = 47285
2) Answer: B
36 * 1.5 = 54
54 * 2.5 = 135
135 * 3.5 = 472.5
472.5 * 4.5 = 2126.25
2126.25 * 5.5 = 11694.375
3) Answer: D
11 * 3 – 2 = 31
31 * 5 – 4 = 151
151 * 7 – 8 = 1049
1049 * 9 – 16 = 9425
9425 * 11 – 32 = 103643
4) Answer: A
73 – 1 = 342
93 – 2 = 727
113 – 3 = 1328
133 – 4 = 2193
153 – 5 = 3370
173 – 6 = 4907
5) Answer: B
456 – 33 = 429
429 – 43 = 365
365 – 53 = 240
240 – 63 = 24
24 – 73 = -319
Directions (6-10) :
Number of car manufactured in A = 15/100 * 18000 = 2700
Number of sold car in A = 3/5 * 2700 = 1620
Number of unsold cars in A = 2/5 * 2700 = 1080
Number of car manufactured in B = 20/100 * 18000 = 3600
Number of sold car in B = 3/4 * 3600 = 2700
Number of unsold cars in B = 1/4 * 3600 = 900
Number of car manufactured in C = 16/100 * 18000 = 2880
Number of sold car in C = 5/8 * 2880 = 1800
Number of unsold cars in C = 3/8 * 2880 = 1080
Number of car manufactured in D = 25/100 * 18000 = 4500
Number of sold car in D = 4/5 * 4500 = 3600
Number of unsold cars in D = 1/5 * 4500 = 900
Number of car manufactured in E = 24/100 * 18000 = 4320
Number of sold car in E = 2/3 * 4320 = 2880
Number of unsold cars in E = 1/3 * 4320 = 1440
6) Answer: C
Number of blue cars sold in C = 2/6 * 1800 = 600
Number of pink cars sold in E = 2880 * 2/9 = 640
Difference = 640 – 600 = 40
7) Answer: D
Required average = (1620 + 2700 + 1800 + 3600 + 2880)/5
= 2520
8) Answer: D
Required ratio = (1080 + 1080):(1440 + 900)
= 2160:2340
= 12:13
9) Answer: E
Required difference = 900 – 900 = 0
10) Answer: A
Required percentage = 1800/18000 * 100 = 10%
