# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 581 - 587 of 1042

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## Question 581

### Question

MCQ▾can do a piece of work in 20 days and can do alone it in 10 days. B works at it for 5 days and then leaves. alone can finish the remaining work in________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 10 days | |

b. | 10.5 days | |

c. | 5 days | |

d. | 11 days |

## Question 582

### Question

MCQ▾Two numbers are in the ratio 7: 9. If each number is increased by 18, the ratio becomes 9: 11. The numbers are________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 35,81 | |

b. | 63,81 | |

c. | 63,85 | |

d. | 65,35 |

## Question 583

### Question

MCQ▾A bag contains 50 paise, 25 paise and 10 paise coins in the ratio 1: 2: 3. If their total value is Rs. 26, the number of 50 paise coins is ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 50 | |

b. | 80 | |

c. | 30 | |

d. | 20 |

## Question 584

## Question 585

### Question

MCQ▾A sum of money is sufficient to pay wages for 15 days and wages for 20 days. The same money is sufficient to pay the wages of both for ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 8 days | |

b. | days | |

c. | days | |

d. | 10 days |

## Question 586

## Question 587

### Question

MCQ▾If 5 men take an hour to dig a ditch, how long should it take 20 men to dig a ditch of the same type?

### Choices

Choice (4) | Response | |
---|---|---|

a. | 13 min | |

b. | 14 min | |

c. | 21 min | |

d. | 15 min |