### Mathmetics

ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams

## Q531. | ## If the number 517 * 324 is completely divisible by 3, then the smallest whole number in the place of * will be: |

1) | 0 | 2) | 1 |

3) | 2 | 4) | 3 |

5) | None of these |

**Answer : 2**

**Explanation :**

**Explanation:**

Sum of digits = (5 + 1 + 7 + x + 3 + 2 + 4) = (22 + x), which is not must be divisible by 3.

So, x = 2.

**View Answer**

## Q532. | ## The sum of two number is 25 and their difference is 13. Find their product. |

1) | 104 | 2) | 114 |

3) | 315 | 4) | 325 |

5) | None of these |

**Answer : 114**

**Explanation :**Explanation:

Let the numbers be x and y.

Then, x + y = 25 and x - y = 13.

4xy = (x + y)

^{2}- (x- y)

^{2}= (25)

^{2}- (13)

^{2}

= (625 - 169) = 456

So, xy = 114.

**View Answer**

## Q533. | ## Find the two natural numbers whose sum is 85 and the LCM is 102 |

1) | 1) 30 and 55 | 2) | 2) 17 and 68 |

3) | 3) 35 and 55 | 4) | 4) 51 and 34 |

5) | 5) None of these |

**Answer : 4) 51 and 34**

**View Answer**

## Q534. | ## The H.C.F. of two numbers is 11 and their L.C.M. is 693. If one of the numbers is 77, find the other. |

1) | 1) 909 | 2) | 2) 119 |

3) | 3) 66 | 4) | 4) 99 |

5) | 5) None of these |

**Answer : 4) 99**

**View Answer**

## Q535. | ## A boat running downstream covers a distance of 24 kms in 4hrs while for covering the distance upstream it takes 6 hrs. What is the speed of the boat in still water ? |

1) | 5.5 km/hr | 2) | 6 km/hr |

3) | 3.5 km/hr | 4) | 4.5 km/hr |

5) | None of these |

**Answer : None of these**

**Explanation :**Ans. 5 km/hr

**View Answer**

## Q536. | ## 23 x 15 / 25 + 48.2 = -35 + ? |

1) | 97 | 2) | 98 |

3) | 95 | 4) | 96 |

5) | None of these |

**Answer : 97**

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## Q537. | ## (562 - 754) /6 = ? / (-5) |

1) | -120 | 2) | 120 |

3) | -160 | 4) | 160 |

5) | None of these |

**Answer : 160**

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## Q538. | ## 5/11 of 55% of 1500 ? |

1) | 395 | 2) | 392 |

3) | 375 | 4) | 372 |

5) | None of these |

**Answer : 375**

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## Q539. | ## (35.2 x 15 x 4) / 12 + 20 = (?) |

1) | (14)2 | 2) | 14 |

3) | 16 | 4) | (14)1/2 |

5) | None of these |

**Answer : 14**

**View Answer**

## Q540. | ## (3 x 4) |

1) | 57.6 | 2) | 59.6 |

3) | 53.2 | 4) | 51.2 |

5) | None of these |

**Answer : 57.6**

**View Answer**