Hello Aspirants.
Welcome to Online Quantitative Aptitude Section in AffairsCloud.com. Here we are creating question sample in Number Series and Quadratic Equations based on prelim pattern, which is common for SBI,IBPS, RBI,LIC, NICL and other competitive exams.
- 2,3,6,20,?
A. 198
B. 198.5
C. 200
D. 202
E. 202.5
Answer & Explanation
Answer – E. 202.5
Explanation :
2² * 0.5 +1 = 3
3² * 0.5 +1.5 = 6
6² * 0.5 +2 = 20
20² * 0.5 +2.5 = 202.5 - 16,58,88,108,120, ?
A. 124
B. 126
C. 136
D. 142
E. 154
Answer & Explanation
Answer – B. 126
Explanation :
16+7² -7 = 58
58+6² -6 = 88
88+5² -5 = 108
108+4² -4 = 120
120+3² -3 = 126 - 20,100,160,200,220,?
A. 240
B. 260
C. 270
D. 280
E. None
Answer & Explanation
Answer – E. None
Explanation :
20+9² – 1² = 100
100+8² – 2² = 160
160+7² – 3² = 200
200+6² – 4² = 220
220+5² – 5² = 220 - 224,?,444,1329,5312,26555
A. 223
B. 224
C. 324
D. 412
E. 444
Answer & Explanation
Answer – A. 223
Explanation :
224*1-1 = 223
223*2 -2 = 444
444*3 – 3 = 1329
1329*4 – 4 = 5312
5312*5 – 5 = 26555 - 10,10,30,70,130,?
A. 160
B. 170
C. 180
D. 190
E. 210
Answer & Explanation
Answer – E. 210
Explanation :
10+5² -5² = 10
10+6² -4² = 30
30+7² – 3² = 70
70+8² – 2² = 130
130+9² – 1² = 210 - An inlet pipe can fill an empty Tank in 2 hours. An outlet pipe can empty the same tank in 6 hours. The tank is also having a hole through which water leaks.The hole is draining water at the 1/3 rd rate of the outlet pipe. Now both Inlet and Outlet pipes are opened in a Tank which is already filled up to 4/9 of its capacity. Then in how many Hours the Tank will be filled thereafter?
A. 1 hour
B. 1 hour 12 min
C. 1 hour 15 min
D. 2 hours
E. None
Answer & Explanation
Answer – D. 2 hours
Explanation :
1/2 – 1/6 – 1/18 = 15/54
54/15*5/9 = 2 - Parthiv’s wife age is 24 and his Son age is 12 as on today. On same day Partiv invented a Time Machine through which he travelled to ancient time. He stayed in ancient time for 6 Years then he returned back. But by Surprise, there is no change in Parthiv’s age after his return. If the difference between the average age of the family before and after is only 4 then Parthiv’s age is?
A. 33
B. 39
C. 40
D. 41
E. Cannot be determined
Answer & Explanation
Answer – E. Cannot be determined
Explanation :
Based on above data
(P+24+12)/3 – (P+30+18)/3 = 4
P always get cancelled - Ramesh wishes to fence a rectangular farm of 2000m 2 area in which length is greater than breadth. He used 130mts of wire to fence the farm on three sides which is the least length of wire which can be utilized by him. The cost of 1 m wire is Rs.3 then how much difference would be there if he fences fours sides instead of three sides?
A. Rs. 130
B. Rs. 150
C. Rs. 180
D. Rs. 200
E. None
Answer & Explanation
Answer – B. Rs. 150
Explanation :
l*b = 2000
2b+l = 130
l = 50 b= 40
cost of fencing three sides = 130*3 = 390
cost of fencing four sides = 180*3 = 540 - A building contractor takes contract to do a work in 30 days by 40 men. In the first 10 days 10 men were absent. In the second 10 days all men were present. Now how many more men he need to employ so that work is finished in time?
A. 10
B. 20
C. 30
D. 40
E. None
Answer & Explanation
Answer – A. 10
Explanation :
40*30 = 30*10+40*10+(40+x)*10
x = 10 - Sravan has to row from place A to place B and back in 6 hours which is at a certain distance. Due to bad light, he couldn’t recognize Place B and rowed 60 Km further. Then he realized and started return back to Place A. Due to this he travelled for 2 more hours than the original journey. Ratio of the speed of Boat to the stream is 2:1. Then what is entire distance covered by him?.
A. 240 Km
B. 300 Km
C. 360 Km
D. 480 Km
E. Cannot be determined
Answer & Explanation
Answer – D. 480 Km
Explanation :
6 = D(1/3x+1/x)
2= 60(1/3x+1/x)
x = 40
D =180
Total distance travelled = (180+60)*2 = 480
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