1.The price of oil is increased by 20%,as a result a family decrease consumption by 25%.The expenditure of the family on oil will be
1).90%increase
2).10%incraese
3).90%decrease
4).10%increase.
4).10%increase.
Exp: (120/100)×(75/100)×100=90.
100-90=10%(should be decrease)
2.A rectangular grassy plot 110 m by 65 m has a gravel path 2.5 m wide all round it on the inside. Find the cost of gravelling the path at 80 paise per sq. Meter
1).Rs.680
2).Rs.860
3).Rs.608
4).None.
1).Rs.680
Exp: overall area of the grassy plot is 110 x 65 =7150 sq. meters.The area of the grassy plot
after applying the gravel path is 105 x 60=6300 sq. meters.Area of the gravel path is 7150 –
6300 = 850 sq.mtrs.Hence x 0.80=Rs.680 .
3.A game of the football with 11 players lasts for exactly 80minutes.There are 4 substitutes that alternate equally.If each player plays for the same length of the time,What is the duration?
1)120m
2)20m
3)84m
4)40m
2)20m
Exp: 80/4=20m.
4.20 workers working 5hours a day can finish the work in 20 days.If the workers went to work for 4hours a day.How many more workers are required to complete the work in same 20days?
1)7
2)4
3)5
4)6
3)5
Exp: workers required for 4h=>(5/4)×20=25.
25-20=5.
5.Pencils are bought at 3 for Rs.2 and sold at 2 for Rs.3.Find the gain percentage
1)100%
2)110%
3)125%
4)115%
3)125%
Exp: [3(3)-2(2)]/4=5/4
In percentage=> (5/4)×100=125%.
6.In how many ways letter of the world BANKING can be arranged so that vowels always come together?
1)240
2)120
3)720
4)540
3)720
Exp: [(6!)/(2!)]×(2!)=360×2=720 [(6!)/(2!)]-letters formed, 2!-Vowels.
7.A bag contain 4 white & 5 red and 6blue color balls,3 balls are drawn randomly.What is the probability of all the balls are red?
1)1/22
2)3/22
3)2/90
4)2/91
4)2/91
Exp: 15C3/5C2=(15×14×13)/(3×2×1)=10/455=2/91
8.A boat cover a certain distance downstream in 2hr while it comeback 3/2hrs.If the speed of the stream be 4kmph.what is the speed of the boat in still water?
1)21kmph
2)18kmph
3)22kmph
4)12kmph
1)21kmph
Exp:(x+3) ×2=(x-3)(3/2)=>21.
9.Two pipes A and B can fill a tank in 5 and 6hrs.Pipe C can empty it in 12hrs.If all the 3 pipes are opened together,then the tank will be filled in
1)1(13/17)hrs
2)2(8/11)hours.
3)3(9/17)hrs
4)4(1/2)hrs
3)3(9/17)hrs
Exp:Net part filled in 1hr=>(1/5+1/6-1/12)=17/60
Tank filled in=60/17=3(9/17).
10.a/3=b/4=c/7 then find (a+b+c)/c.
1)7
2)2
3)1/2
4)1/7.
2)2
Exp: (3+4+7)/7=>14/2=2.
1).90%increase
2).10%incraese
3).90%decrease
4).10%increase.
4).10%increase.
Exp: (120/100)×(75/100)×100=90.
100-90=10%(should be decrease)
2.A rectangular grassy plot 110 m by 65 m has a gravel path 2.5 m wide all round it on the inside. Find the cost of gravelling the path at 80 paise per sq. Meter
1).Rs.680
2).Rs.860
3).Rs.608
4).None.
1).Rs.680
Exp: overall area of the grassy plot is 110 x 65 =7150 sq. meters.The area of the grassy plot
after applying the gravel path is 105 x 60=6300 sq. meters.Area of the gravel path is 7150 –
6300 = 850 sq.mtrs.Hence x 0.80=Rs.680 .
3.A game of the football with 11 players lasts for exactly 80minutes.There are 4 substitutes that alternate equally.If each player plays for the same length of the time,What is the duration?
1)120m
2)20m
3)84m
4)40m
2)20m
Exp: 80/4=20m.
4.20 workers working 5hours a day can finish the work in 20 days.If the workers went to work for 4hours a day.How many more workers are required to complete the work in same 20days?
1)7
2)4
3)5
4)6
3)5
Exp: workers required for 4h=>(5/4)×20=25.
25-20=5.
5.Pencils are bought at 3 for Rs.2 and sold at 2 for Rs.3.Find the gain percentage
1)100%
2)110%
3)125%
4)115%
3)125%
Exp: [3(3)-2(2)]/4=5/4
In percentage=> (5/4)×100=125%.
6.In how many ways letter of the world BANKING can be arranged so that vowels always come together?
1)240
2)120
3)720
4)540
3)720
Exp: [(6!)/(2!)]×(2!)=360×2=720 [(6!)/(2!)]-letters formed, 2!-Vowels.
7.A bag contain 4 white & 5 red and 6blue color balls,3 balls are drawn randomly.What is the probability of all the balls are red?
1)1/22
2)3/22
3)2/90
4)2/91
4)2/91
Exp: 15C3/5C2=(15×14×13)/(3×2×1)=10/455=2/91
8.A boat cover a certain distance downstream in 2hr while it comeback 3/2hrs.If the speed of the stream be 4kmph.what is the speed of the boat in still water?
1)21kmph
2)18kmph
3)22kmph
4)12kmph
1)21kmph
Exp:(x+3) ×2=(x-3)(3/2)=>21.
9.Two pipes A and B can fill a tank in 5 and 6hrs.Pipe C can empty it in 12hrs.If all the 3 pipes are opened together,then the tank will be filled in
1)1(13/17)hrs
2)2(8/11)hours.
3)3(9/17)hrs
4)4(1/2)hrs
3)3(9/17)hrs
Exp:Net part filled in 1hr=>(1/5+1/6-1/12)=17/60
Tank filled in=60/17=3(9/17).
10.a/3=b/4=c/7 then find (a+b+c)/c.
1)7
2)2
3)1/2
4)1/7.
2)2
Exp: (3+4+7)/7=>14/2=2.
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