Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q61. | What are the two natural numbers whose difference is 66 and the LCM is 360 ? |
| 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 5So, two numbers are 2 X 2 X 2 X 3 =24 and 2 X 3 X 3 X 5 = 90
View AnswerQ62. | A shopkeeper sells some articles on profit of 20% of the cost price. Find out the actual Gain ? I. Selling price of the article. II. Cost price of the article |
| 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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Q63. | 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= 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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Q64. | Directions:In each of the following questions a number series is given. After the series a number is given followed by (a),(b),(c),(d)&(e).Yoy have to complete the series starting with the number given, following the sequence of the given series, and answer the questions given below the series.
(A) 4 2 3 7.5 26.25 118.125 (B) 6 (a) (b) (c) (d) (e)
What will come in the place of (c) ?
|
| 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
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Q65. | Directions:In each of the following questions a number series is given. After the series a number is given followed by (a),(b),(c),(d)&(e).Yoy have to complete the series starting with the number given, following the sequence of the given series, and answer the questions given below the series.
(A) 2 3 7 25 121 721 (B) 3 (a) (b) (c) (d) (e)
What will come in the place of (c) ?
|
| 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 ...
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Q66. | Directions:In each of the following questions a number series is given. After the series a number is given followed by (a),(b),(c),(d)&(e).Yoy have to complete the series starting with the number given, following the sequence of the given series, and answer the questions given below the series.
(A) 2 3 10 39 172 885 (B) 5 (a) (b) (c) (d) (e)
What will come in the place of (d) ? |
| 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 ....
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Q67. | Directions:In each of the following questions a number series is given. After the series a number is given followed by (a),(b),(c),(d)&(e).Yoy have to complete the series starting with the number given, following the sequence of the given series, and answer the questions given below the series.
(A) 3 12 30 66 138 282 (A) 7 (a) (b) (c) (d) (e)
What will come in the place of (b)?
|
| 1) | 34 |
2) | 46 |
| 3) | 70 |
4) | 76 |
| 5) | None of these |
Answer : 46
Explanation : x 2 +6 , x 2+6 , and so on
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Q68. | Directions:In each of the following questions a number series is given. After the series a number is given followed by (a),(b),(c),(d)&(e).Yoy have to complete the series starting with the number given, following the sequence of the given series, and answer the questions given below the series.
(A) 7 20 46 98 202 410 (A) 4 (a) (b) (c) (d) (e)
What will come in the place of (d)?
|
| 1) | 146 |
2) | 162 |
| 3) | 166 |
4) | 184 |
| 5) | None of these |
Answer : None of these
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Q69. | Directions:In each of the following questions a number series is given. After the series a number is given followed by (a),(b),(c),(d)&(e).Yoy have to complete the series starting with the number given, following the sequence of the given series, and answer the questions given below the series.
(A) 9 10 16 57 212 1085 (A) 2 (a) (b) (c) (d) (e)
What will come in the place of (c)?
|
| 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
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Q70. | Directions:In each of the following questions a number series is given. After the series a number is given followed by (a),(b),(c),(d)&(e).Yoy have to complete the series starting with the number given, following the sequence of the given series, and answer the questions given below the series.
(A) 3 5 22 13.5 35 19 (B) 5 (a) (b) (c) (d) (e)
What will come in the place of (c)?
|
| 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
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