When n is divided by 6, the remainder is 4. When 2n is divided by 6, the remainder is
2
0
4
1
Answer : Option A.
When n is divided by 6, the remainder is 4. Hence,the number can be written as n = 6k +4
hence, 2n = 12k + 8 and when 2n is divided by 6 : remainder will be ( 12 k + 8 ) / 6 = 2
So,12k gives remainder 0 with 6 and 8 gives remainder 2 with 6. So, remainder is 0 + 2 = 2.Hence, Ans is option A.
The value of is 1/20 + 1/30 + 1/42 + 1/56 + 1/72 + 1/90 is
The smallest among the numbers 2250, 3150, 5100 and 4200 is
4200
5100
3150
2250
Answer : Option B.
2250, 3150, 5100 and 4200 can be written as :
2250 = ( 2 )5*50 = 3250
3150 = ( 3 )3*50 = 2750
5100 = ( 5 )2*50 = 2550
4200 = ( 4 )4*50 = 25650
Hence, the smallest number is 5100
So, Ans is option B.
The greatest of the following numbers 0.16, √0.16, (0.16)2, 0.04 is
0.16
√0.16
0.04
(0.16)2
Answer : Option B.
Check Each Option
A => 0.16
B => 0.4
C => 0.04
D => (0.16)2 = 0.0256
Hence, the greatest number is 0.4
So, Ans is option B.
If part of a journey takes 10 minutes, then to complete ( 3 / 5 )th of that journey, it will take
40 minutes
45 minutes
48 minutes
36 minutes
Answer : Option C.
part of journey means = 4 - 155/40 = 5/40th of the journey will take 10 mins
Hence, for the full journey it will take 80 mins
Therfore for 3/5 th of the journey,it will take = ( 3/5 ) * 80 = 48 mins
Hence, Ans is option C.
If a number is increased by 25% and the resulting number is decreased by 25%,then the percentage increase or decrease finally is
No change
Decreased by 61/4%
Increased by 61/4%
Increased by 6%
Answer : Option B.
Let the number be 100.
So 100 + 25% = 125
125 - 25% = 93.75
So net change = 100 - 93.75 = 6.25%
A reduction of 20% in the price of rice enables a customer to purchase 12.5 kg more for Rs. 800. The original price of rice per kg is
Rs. 14
Rs. 16/-
Rs. 12/-
Rs. 15/-
Answer : Option B.
Let the price of rice is Rs x / kg
As per the question
800/ 0.8x - 800 / x = 12.5
160/0.8x = 12.5
on solving x= 16
In two alloys A and B, the ratio of zinc to tin is 5 : 2 and 3 : 4 respectively. Seven kg of the alloy A and 21 kg of the alloy B are mixed together to form a new alloy. What will be the ratio of zinc and tin in the new alloy?
2:1
1:2
2:3
1:1
Answer : Option D.
Alloy A : which weighted 7 kg has zinc & tin in ratio = 5 : 2 i.e Zinc in alloy A = 5 kg & tin in alloy A = 2kg
Alloy B : which weighted 21 kg has zinc & tin in ratio = 3 : 4 i.e Zinc in alloy A = 9 kg & tin in alloy A = 12kg
Hence, total Zinc : total tin = 14 : 14 = 1 : 1 So, answer is option D.
If A : B = 3 : 4 and B : C = 6 : 5, then C : A is
10;9
9:10
8:9
9:8
Answer : Option A.
A : B = 3 : 4 and B : C = 6 : 5,
Then C : A will be = A : B : C = 9 : 12 : 10
Hence, ratio of C : A = 10: 9.
Hence, answer is option A.
part of a journey takes 10 minutes, then to complete ( 3 / 5 )th of that journey, it will take
