Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q81. |
|
1) | 200 litre | 2) | 250 litre |
3) | 300 litre | 4) | 400 litre |
5) | None of these |
Answer : 300 litre
Explanation : Let, the milkman buy x liter of milk.
Explanation : Let, the milkman buy x liter of milk.
He sells at at rupees 16 a liter.
SP1 = Rs.16x, but losses Rs.600/
If he sells at 20 a liter, the SP2 = Rs.20x , but gains Rs.600/
Difference in SP = Rs.20x - Rs.16x = Rs.4x
Difference in actual SP = Rs.600 + Rs.600 = Rs.1200
So, 4x = 1200
or x = 1200/4 = 300

Q82. |
|
1) | Rs.17000 | 2) | Rs.17500 |
3) | Rs.18000 | 4) | Rs.18500 |
5) | None of these |
Answer : Rs.17500

Q83. |
|
1) | 1:2 | 2) | 1:3 |
3) | 3:4 | 4) | 2:5 |
5) | None of these |
Answer : 1:3

Q84. |
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1) | 50% | 2) | 60% |
3) | 70% | 4) | 80% |
5) | None of these |
Answer : 80%

Q85. |
|
1) | 6:5 | 2) | 7:5 |
3) | 8:5 | 4) | 9:5 |
5) | None of these |
Answer : 7:5

Q86. | When 20% of a number added to another number, the second number increases by its 50%. what is the ratio between two numbers ? |
1) | 2:5 | 2) | 5:2 |
3) | 2:3 | 4) | 3:4 |
5) | None of these |
Answer : 5:2

Q87. |
|
1) | 3 : 4 | 2) | 21 : 11 |
3) | 11 : 25 | 4) | 4 : 3 |
5) | None of these |
Answer : 21 : 11
Explanation :
Explanation :
Let the side of the cube be ‘a’
Volume of the cube = a3
Diameter of the sphere = a


Q88. |
|
1) | 1/3 | 2) | 1/4 |
3) | 1/2 | 4) | No change |
5) | None of these |
Answer : 1/2
Explanation :

Explanation :
Let the length and breadth of the rectangle be L and B respectively.
Area = L x B = LB


Q89. |
|
1) | 6050 | 2) | 10060 |
3) | 12040 | 4) | 24200 |
5) | None of these |
Answer : 24200
Explanation : We can express , (23+43+63+83+ 103+...............+203) =
Explanation : We can express , (23+43+63+83+ 103+...............+203) =
23 x (13+23+33+43+ 53+63+................+103) = 8 x 3025 = 24200

Q90. | Given that, (12+22+32+42+ 52+62+72) = x +1 , the find the value of the following expressions: |
1) | 2(x+1) | 2) | 4(x+1) |
3) | 8(x+2) | 4) | 16(x+1) |
5) | None of these |
Answer : 4(x+1)
Explanation : We can write, (22+42+62+82+102+122+ 142) = 22 x (12+22+32+42+ 52+62+72) = 4(x+1)
Explanation : We can write, (22+42+62+82+102+122+ 142) = 22 x (12+22+32+42+ 52+62+72) = 4(x+1)
