Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q61. |
|
| 1) | 30 | 2) | 31 |
| 3) | 32 | 4) | 35 |
| 5) | None of these | ||
Answer : 30
Explanation : HCF of 408 and 312 is 24.
Explanation : HCF of 408 and 312 is 24.
So, total numbers of sections = (408+312) /24 = 30
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Q62. |
|
| 1) | 90 and 24 | 2) | 120 and 24 |
| 3) | 120 and 54 | 4) | 180 and 114 |
| 5) | None of these | ||
Answer : 90 and 24
Explanation : The factors of 360 = 2 X 2 X 2 X 3 X 3 X 5
Explanation : The factors of 360 = 2 X 2 X 2 X 3 X 3 X 5
So, two numbers are 2 X 2 X 2 X 3 =24 and 2 X 3 X 3 X 5 = 90
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Q63. |
|
| 1) | Neither I nor II | 2) | Either I or II |
| 3) | Both I and II | 4) | Only II |
| 5) | Only I | ||
Answer : Either I or II
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Q64. | If x=2015, y=2014 and 2013 , then x2+y2+z2 -xy-yz-zx = ? |
| 1) | 2 | 2) | 3 |
| 3) | 4 | 4) | 6 |
| 5) | None of these | ||
Answer : 3
Explanation : ATQ: x2+y2+z2 -xy-yz-zx
Explanation : ATQ: x2+y2+z2 -xy-yz-zx
= x2-xy+y2 -yz+z2-zx
= x(x-y) + y((y-z) + z(z-x)
= 2015(2015-2014) + 2014(2014-2013)+2013(2013-2015)
= 2015 + 2014 + 4026
=4029-4026 =3
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Q65. |
|
| 1) | 12.25 | 2) | 11.5 |
| 3) | 11.125 | 4) | 12.5 |
| 5) | None of these | ||
Answer : None of these
Explanation : x .5, x1.5, x 2.5, x 3.5 , x 4.5 and so on
Explanation : x .5, x1.5, x 2.5, x 3.5 , x 4.5 and so on
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Q66. |
|
| 1) | 31 | 2) | 39 |
| 3) | 45 | 4) | 49 |
| 5) | None of these | ||
Answer : 49
Explanation : x 2 -1, x 3-2, x 4-3, x 5 -4 and so on ...
Explanation : x 2 -1, x 3-2, x 4-3, x 5 -4 and so on ...
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Q67. |
|
| 1) | 175 | 2) | 196 |
| 3) | 208 | 4) | 244 |
| 5) | None of these | ||
Answer : 244
Explanation : x 1+12,, x 2+22, x 3+32, x 4+42 and so on ....
Explanation : x 1+12,, x 2+22, x 3+32, x 4+42 and so on ....
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Q68. |
|
| 1) | 34 | 2) | 46 |
| 3) | 70 | 4) | 76 |
| 5) | None of these | ||
Answer : 46
Explanation : x 2 +6 , x 2+6 , and so on
Explanation : x 2 +6 , x 2+6 , and so on
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Q69. |
|
| 1) | 146 | 2) | 162 |
| 3) | 166 | 4) | 184 |
| 5) | None of these | ||
Answer : None of these
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Q70. |
|
| 1) | 15 | 2) | 18 |
| 3) | 25 | 4) | 36 |
| 5) | None of these | ||
Answer : 15
Explanation : x 1 + 12, x 2 -22, x 3+32, x 4 -42 and so on
Explanation : x 1 + 12, x 2 -22, x 3+32, x 4 -42 and so on
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