# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 682 - 686 of 931

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## Question 682

### Question

MCQ▾One quality of wheat at Rs. 9.30 per kg is mixed with another quality at a certain rate in the ratio. If the mixture so formed be worth Rs. 10 per kg, what is the rate per kg of the second quality of wheat?

### Choices

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

a. | Rs. 11 | |

b. | Rs. 10.60 | |

c. | Rs. 10.80 | |

d. | Rs. 10.30 |

## Question 683

### Question

MCQ▾A bicycle is sold at a gain of . If it had been sold for Rs. 20 more, would have been gained. The C. P. of the bicycle is ________

### Choices

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

a. | Rs. 600 | |

b. | Rs. 350 | |

c. | Rs. 500 | |

d. | Rs. 400 |

## Question 684

### Question

MCQ▾A certain number of men can finish a piece of work in 100 days. If there were 10 men less, it would take 10 days more for the work to be finished. How many men were there originally?

### Choices

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

a. | 146 | |

b. | 110 | |

c. | 75 | |

d. | 147 |

## Question 685

### Question

MCQ▾The King, queen and jack of clubs are removed from a deck of 52 cards and then well-shuffled. One card id selected from the remaining cards. The probability of getting a black card is ________

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 686

### Question

MCQ▾Average weight of 9 persons is 48 kg. If one man weighing 32 kg, died, what is an average age of the remaining 8 persons.

### Choices

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

a. | 50 | |

b. | 52 | |

c. | 56 | |

d. | 54 |