Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q71. |
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| 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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Q72. |
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| 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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Q73. | 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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Q74. |
|
| 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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Q75. |
|
| 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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Q76. |
|
| 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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Q77. |
|
| 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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Q78. |
|
| 1) | 146 | 2) | 162 |
| 3) | 166 | 4) | 184 |
| 5) | None of these | ||
Answer : None of these
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Q79. |
|
| 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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Q80. |
|
| 1) | 13 | 2) | 14.5 |
| 3) | 15.5 | 4) | 16 |
| 5) | None of these | ||
Answer : 14.5
Explanation : +7 x 1/2 , +6 x 2 , + 5 x 1/2, + 4 x 2, so on
Explanation : +7 x 1/2 , +6 x 2 , + 5 x 1/2, + 4 x 2, so on
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