# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 201 - 206 of 929

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## Question number: 201

» Lines, Angles and Quadrilaterals

### Question

In the given figure, the value of y is ________

### Choices

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

a. | 10 | |

b. | 20 | |

c. | 24 | |

d. | 22 |

## Question number: 202

» Lines, Angles and Quadrilaterals

### Question

In the given figure, , and , find

### Choices

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

a. | 55˚ | |

b. | 50˚ | |

c. | 45˚ | |

d. | 60˚ |

## Question number: 203

» Lines, Angles and Quadrilaterals

### Question

Ray OE bisects ∠AOB and OF is the ray opposite OE, then ∠FOB = ________

### Choices

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

a. | ∠BOE | |

b. | ∠FOE | |

c. | ∠AOE | |

d. | ∠FOA |

## Question number: 204

» Lines, Angles and Quadrilaterals

### Question

In the figure, p is greater than q by one third of a right angle. Find the values of p and q.

### Choices

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

a. | p = 75˚ and q = 105˚ | |

b. | p = 105˚ and q = 75˚ | |

c. | p = 115˚ and q = 65˚ | |

d. | p = 65˚ and q = 115˚ |

## Question number: 205

» Lines, Angles and Quadrilaterals

### Question

If two supplementary angles are in the ratio 13: 5, then the angles is ________

### Choices

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

a. | 125˚, 55˚ | |

b. | 145˚, 35˚ | |

c. | 130˚, 50˚ | |

d. | 120˚, 60˚ |

## Question number: 206

» Lines, Angles and Quadrilaterals

### Question

In the given figure, ∠COD is a right angle. ∠AOC and ∠BOD are in the ratio of 3: 2, thus ∠BOD measures________

### Choices

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

a. | 50˚ | |

b. | 40˚ | |

c. | 36˚ | |

d. | 54˚ |