# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 121 - 126 of 931

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## Question 121

### Question

MCQ▾The angles of quadrilateral are in the ratio . All angles of a quadrilaterals are________

### Choices

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

a. | 72˚, 36˚, 108˚, 144˚ | |

b. | 36˚, 60˚, 20˚, 156˚ | |

c. | 145˚, 20˚, 30˚, 60˚ | |

d. | 108˚, 144˚, 45˚, 15˚ |

## Question 122

### Question

MCQ▾In figure PQ, ₹ and TU are three lines concurrent at A. If ∠ PAU = 6y˚, ∠ QAS = 4y˚ and ∠ RAT = 2y˚, the value of y is________

### Choices

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

a. | 15 | |

b. | 20 | |

c. | 25 | |

d. | 30 |

## Question 123

### Question

MCQ▾The complementary angle of an angle is one fourth of itself. Then the angle of its complement are________

### Choices

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

a. | 45˚, 45˚ | |

b. | 72˚, 18˚ | |

c. | 55˚, 35˚ | |

d. | 60˚, 30˚ |

## Question 124

### Question

MCQ▾The angles of a triangle are in the ratio . The triangle is ________

### Choices

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

a. | Acute | |

b. | Isosceles | |

c. | Obtuse | |

d. | None of the above |

## Question 125

### Question

MCQ▾The given figure PQRS is a parallelogram then the values of and are________

### Choices

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

a. | 35˚, 70˚ | |

b. | 60˚, 45˚ | |

c. | 45˚, 60˚ | |

d. | 70˚, 35˚ |

## Question 126

### Question

MCQ▾In the figure, a is greater than b by one fifth of a right angle. Then a, b respectively are________

### Choices

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

a. | 99˚, 81˚ | |

b. | 50˚, 120˚ | |

c. | 130˚, 60˚ | |

d. | 120˚, 110˚ |