# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 541 - 545 of 1022

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## Question number: 541

### Question

A CD stand has 36 CDs of movies. On Sunday, 21 CDs were viewed by Rani. How many CDs remain unwatched?

### Choices

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

a. | 25 | |

b. | 12 | |

c. | 15 | |

d. | 11 |

## Question number: 542

### Question

The selling price of a necklace is Rs. 25800 and the loss percent is . Find the cost price of the necklace.

### Choices

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

a. | Rs. 30961 | |

b. | Rs. 30491 | |

c. | Rs. 39601 | |

d. | Rs. 32600 |

## Question number: 543

### Question

Meet’s father was 31 years old when his sister was born. His mother is 3 years younger than his father. Now Meet is 25 years old and his sister is 4 years older than him. What is the present age of Meet’s mother?

### Choices

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

a. | 56 years | |

b. | 59 years | |

c. | 57 years | |

d. | 60 years |

## Question number: 544

### Question

In a company, there are 45 % female employees. 40 % of all the male employees are developer. If there 58 % employees are developer out of the total 1800 employees, then the number of female employees who are developer are ________.

### Choices

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

a. | 652 | |

b. | 648 | |

c. | Can’t be determined | |

d. | 940 |

## Question number: 545

### Question

Rohan has certain amount in his account. He gives two-third of this to his mother and one third of the remaining to his daughter. The amount left with him now is ________.

### Choices

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

a. | of the original | |

b. | of the original | |

c. | of the original | |

d. | of the original |