# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 841 - 847 of 931

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## Question 841

### Question

MCQ▾If and , then value of is________.

### Choices

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

a. | 770 | |

b. | 555 | |

c. | 227 | |

d. | 115 |

## Question 842

### Question

MCQ▾The median of the observation 2, 1, 12, 29, 25, 12,10, 4,5 is ________

### Choices

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

a. | 15 | |

b. | 12 | |

c. | 10 | |

d. | 25 |

## Question 843

### Question

MCQ▾A man purchased two clocks P and Q at a total cost ₹ 800. He sells P at profit and Q at a loss of and gets the same selling price for both the clocks. What are the purchasing prices of P and Q respectively?

### Choices

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

a. | ₹ 275, ₹ 425 | |

b. | ₹ 266.67, ₹ 533.33 | |

c. | ₹ 250.65, ₹ 200.22 | |

d. | ₹ 360, ₹ 850 |

## Question 844

### Question

MCQ▾The mean of 24 observations is 35. If the mean of the first 12 observations is 31 and that of the last 12 observations is 38, then the 12^{th} observation is ________

### Choices

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

a. | 15 | |

b. | 11 | |

c. | 14 | |

d. | 12 |

## Question 845

### Question

MCQ▾Choose the correct alternative that will continue the same pattern. 6, 11, 21,36, 56, (…)

### Choices

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

a. | 91 | |

b. | 42 | |

c. | 81 | |

d. | 51 |

## Question 846

### Question

MCQ▾Which equation satisfies the data in the table?

X | 3 | 5 | 7 | 9 |

Y | 2 | 4 | 6 | 8 |

### Choices

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

a. | ||

b. | ||

c. | ||

d. |