# Playing with Numbers [IMO Level 1- Mathematics Olympiad (SOF) Class 6]: Questions 1 - 8 of 86

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## Question 1

### Question

MCQ▾A number is always divisible by 90 if

### Choices

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

a. | It is divisible by both 2 and 45 | |

b. | It is divisible by both 5 and 18 | |

c. | It is divisible by both 9 and 10 | |

d. | All a., b. and c. are correct |

## Question 2

### Question

MCQ▾The prime number that is placed at fifth after prime number 7 is

### Choices

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

a. | 27 | |

b. | 19 | |

c. | 23 | |

d. | 29 |

## Question 3

### Question

MCQ▾Observe the following patterns. Then find the sum of .

… …

### Choices

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

a. | 81 | |

b. | 121 | |

c. | 64 | |

d. | 100 |

## Question 4

### Question

MCQ▾The number (12,7) are

### Choices

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

a. | Co-prime numbers | |

b. | Prime and co-prime | |

c. | Prime numbers | |

d. | None of the above |

## Question 5

## Question 6

### Question

MCQ▾There are 207 white balls and 115 blue balls. These balls are to be arranged in buckets containing the same number of balls. Then the greatest number of balls possible in each bucket is

### Choices

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

a. | 23 | |

b. | 18 | |

c. | 28 | |

d. | 217 |

## Question 7

### Question

MCQ▾The number 6,43, 590 is divisible by

### Choices

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

a. | 6 | |

b. | 3 | |

c. | 2 | |

d. | All a., b. and c. are correct |

## Question 8

### Question

MCQ▾Number of prime numbers from 20 to 70 are

### Choices

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

a. | 9 | |

b. | 13 | |

c. | 11 | |

d. | 16 |