# IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 230 - 238 of 1059

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## Question number: 230

### Question

The least number which when decreased by 7 is exactly divisible by 6,7, 21 and 42 is

### Choices

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

a. | 35 | |

b. | 53 | |

c. | 49 | |

d. | 36 |

## Question number: 231

### Question

HCF of the two numbers =

### Choices

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

a. | Product of numbers × their LCM | |

b. | Product of numbers + their LCM | |

c. | Product of numbers - their LCM | |

d. | Product of numbers ÷ their LCM |

## Question number: 232

### Question

Which of the following is the pair that is not twin primes?

### Choices

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

a. | (5,7) | |

b. | (11,13) | |

c. | (17,19) | |

d. | (23,29) |

## Question number: 233

### Question

Product of two integer is If one of the integers is , then the other is

### Choices

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

a. | 28 | |

b. | 8 | |

c. | 1 | |

d. | 0 |

## Question number: 234

### Question

The least number of square tiles that will be needed to pave a plot 225 m by 30 m is

### Choices

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

a. | 25 tile | |

b. | 30 tiles | |

c. | 15 tiles | |

d. | 45 tiles |

## Question number: 235

### Question

The number (67,54) are

### Choices

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

a. | Co-prime numbers | |

b. | Prime numbers | |

c. | prime and co-prime | |

d. | All of the above |

## Question number: 236

### Question

The number 11284 and 7655 when divided by a certain 3 digit number leave the same remainder. Find the number and the remainder

### Choices

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

a. | 191,15 | |

b. | 190,14 | |

c. | 180,20 | |

d. | 195,25 |

## Question number: 237

### Question

The integer which is 5 less than is

### Choices

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

a. | 13 | |

b. | - 15 | |

c. | 8 | |

d. | 9 |

## Question number: 238

### Question

The number (9,8) are

### Choices

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

a. | Prime numbers | |

b. | Co-prime numbers | |

c. | Prime and co-prime | |

d. | Question does not provide sufficient data or is vague |