# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 848 - 853 of 931

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## Question 848

### Question

MCQ▾In a mathematics test given to 15 students, the following marks (out of 100) is recorded: 45, 56, 78, 54, 75, 34, 68, 98, 87, 99, 90, 76, 55,77, 68, then mean, median and mode of this data are respectively ________

### Choices

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

a. | 70.67,75, 68 | |

b. | 55.26,78, 65 | |

c. | 70.67,77, 68 | |

d. | 60.67,75, 65 |

## Question 849

### Question

MCQ▾A man purchased two clocks A and B at a total cost ₹ 650. He sells A at profit and B at a loss of and gets the same selling price for both the clocks. What are the purchasing prices of A and B respectively?

### Choices

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

a. | ₹ 275, ₹ 375 | |

b. | ₹ 300, ₹ 350 | |

c. | ₹ 250, ₹ 400 | |

d. | ₹ 225, ₹ 425 |

## Question 850

### Question

MCQ▾The sum of the x-coordinates of the intersection of and , is ________.

### Choices

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

a. | ||

b. | 0 | |

c. | ||

d. |

## Question 851

### Question

MCQ▾Average of 10 numbers is 12. What should be added as 11^{th} number to make the average 13?

### Choices

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

a. | 28 | |

b. | 23 | |

c. | 30 | |

d. | 25 |

## Question 852

### Question

MCQ▾Mathematics is related to numbers in the same way as history is related to ________

### Choices

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

a. | Dates | |

b. | Events | |

c. | Wars | |

d. | People |

## Question 853

### Question

MCQ▾Age of Smith՚s father is 4 times of his age. If 5 years ago, father՚s age was 7 times of the age of his son at that time. What is Smith՚s father present age?

### Choices

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

a. | 40 years | |

b. | 60 years | |

c. | 45 years | |

d. | 51 years |