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.
Missing number series
Directions (01-05): What value should come in the place of (?) in the following number series?
1) 6, 30, 66, 114, 174, ?
A.246
B.248
C.251
D.258
E.261
2) 18, 55, 167, 504, ?, 4553
A.1532
B.1516
C.1782
D.1592
E.2018
3) 960, 1023, 1088, 1155, 1224, ?
A.1290
B.1285
C.1295
D.1225
E.1320
4) 32, 49, 75, 112, 162, ?
A.184
B.217
C.227
D.235
E.248
5) 19, 19, 21, 27, 39, ?
A.41
B.56
C.48
D.59
E.45
Ages
6) After 8 years the average ages of Renu, Manu and Tinu is 43 years and ratio of the present ages of Renu, Manu and Tinu is 8:12:15, then what is the sum of the ages of Renu, Manu and Tinu four years ago?
A.88 years
B.90 years
C.93 years
D.96 years
E.None of these
Profit and loss
7) Sunil, Irfan and Ranbir started the business with the investment in the ratio of 4:5:3. If after 8 months Irfan left the business. At the end of the year, the sum of the profit share of Sunil and Ranbir is Rs.4200, then find the profit share of irfan?
A.Rs.1000
B.Rs.1500
C.Rs.1800
D.Rs.2000
E.None of these
Profit and loss
8) The marked price of the article is 25% more than the cost price of the article. If the discount offered by shopkeeper is 16 % and the sum of the marked and cost price of the article is Rs.5760, then find the profit percentage of article.
A.5%
B.2%
C.8%
D.4%
E.1%
Boat and stream
9) A boat covers 180 km along with stream in 18 hours and the same boat covers 144 km against stream in 24 hours. The speed of the stream is what percent of the speed of the boat in still water?
A.20%
B.15%
C.25%
D.30%
E.None of these
Pipes and cistern
10) Pipe A fill the tank in 18 hours and pipe B fill the tank in 27 hours and pipe C emptied the tank in 30 hours. If pipe A, B and C opened simultaneously, how many hours required fill the tank completely?
A.16(7/8) hours
B.15(7/8) hours
C.12(7/8) hours
D.18(7/8) hours
E.None of these
Answers :
1) Answer: A
6 + (12 * 2) = 30
30 + (12 * 3) = 66
66 + (12 * 4) = 114
114 + (12 * 5) = 174
174 + (12 * 6) = 246
2) Answer: B
18 * 3 + 1 = 55
55 * 3 + 2 = 167
167 * 3 + 3 = 504
504 * 3 + 4 = 1516
1516 * 3 + 5 = 4553
3) Answer: C
312 – 1 = 960
322 – 1 = 1023
332 – 1 = 1088
342 – 1 = 1155
352 – 1 = 1224
362 – 1 = 1295
4) Answer: C
32 + 42Â + 1 = 49
49 + 52Â + 1 = 75
75 + 62Â + 1 = 112
112 + 72Â + 1 = 162
162 + 82Â + 1 = 227
5) Answer: D
19 + 12 – 1 = 19
19 + 22 – 2 = 21
21 + 32 – 3 = 27
27 + 42 – 4 = 39
39 + 52 – 5 = 59
6) Answer: C
8x + 8 + 12x + 8 + 15x + 8 = 43 * 3
35x = 105
x = 3
Renu = 8 * 3 = 24 years
Manu = 12 * 3 = 36 years
Tinu = 15 * 3 = 45 years
Required sum = 24 + 36 + 45 – 12 = 93 years
7) Answer: D
Profit ratio of Sunil, Irfan and Ranbir = 4 * 12:5 * 8:3 * 12
= 12:10:9
Irfan’s profit share = 10/21 * 4200 = Rs.2000
8) Answer: A
Let assume, CP = x
MP = x * 125/100 = 5x/4
5x/4 + x = 5760
9x = 5760 * 4
x = 2560
MP of the article = 5 * 2560/4 = Rs.3200
SP = 3200 * 84/100 = 2688
Profit = 2688 – 2560 = Rs.128
Profit percentage = 128/2560 * 100 = 5%
9) Answer: C
Speed of boat along with stream = 180/18 = 10 kmph
Speed of the boat against stream = 144/24 = 6 kmph
Speed of the boat in still water = (10 + 6)/2 = 8 kmph
Speed of the stream = (10 – 6)/2 = 2 kmph
Required percentage = 2/8 * 100 = 25%
10) Answer: A
A + B – C = 1/18 + 1/27 – 1/30
= (15 + 10 – 9)/270
= 8/135
Required time = 135/8 = 16(7/8) hours
