# IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 552 - 556 of 968

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## Question 552

### Question

MCQ▾Dharma got married 5 years ago. Today her age is times her age at the time of marriage. Her son՚s age is times her age. Her son՚s age is ________

### Choices

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

a. | 13 years | |

b. | 12 years | |

c. | 10 years | |

d. | 15 years |

## Question 553

### Question

MCQ▾One fourth of a head of cows is in the forest. Twice the square root of the head has gone to mountains, and of the remaining, 15 are on the bank of a river. The total number of cows is ________

### Choices

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

a. | 6 | |

b. | 63 | |

c. | 36 | |

d. | 100 |

## Question 554

### Question

MCQ▾P is thrice good a workman as Q and therefore is able to finish a job in 40 days less than Q. Working together they can do it in ________ days.

### Choices

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

a. | 16 | |

b. | 15 | |

c. | 14 | |

d. | 10 |

## Question 555

### Question

MCQ▾A girl calculates that the probability of her winning the first prize in a lottery is 0.15. If 8000 tickets are sold, how many tickets has she bought?

### Choices

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

a. | 1400 | |

b. | 1800 | |

c. | 1200 | |

d. | 1600 |

## Question 556

### Question

MCQ▾A man whose bowling average is 12.4 takes 5 wickets for 26 runs and thereby decreases his average by 0.4. The number of wickets, taken by him, before his last match, is ________

### Choices

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

a. | 72 | |

b. | 85 | |

c. | 64 | |

d. | 78 |