# IMO Level 1- Mathematics Olympiad (SOF) Class 3: Questions 20 - 23 of 582

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## Question number: 20

### Question

Which of the following number name belongs to the monkey’s number?

### Choices

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

a. | Seven hundred fifty three | |

b. | Seven thousand eight fifty three | |

c. | Seven thousand eight hundred fifty three | |

d. | All of the above |

## Question number: 21

### Question

Mr. Sharma wrote a 2-digit number on the blackboard. Three students Gopal,

Raju and Prashant said the following about that number.

Gopal: “It is a greatest 2-digit number”.

Raju: “It is the predecessor of least 3-digit number”.

Prashant: “It is having three different digits”.

What is the number, if only two of the three students said the truth?

### Choices

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

a. | 100 | |

b. | 123 | |

c. | 10 | |

d. | 99 |

## Question number: 22

### Question

The greatest four-digit number that can be formed using 7,0, 6,5 without repeating the digits is ________.

### Choices

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

a. | 7560 | |

b. | 7650 | |

c. | 7065 | |

d. | 6570 |

## Question number: 23

### Question

Madhuri wrote a number on the black board as shown below.

If it is formed from three different digits, then which of the following number could be placed in the gap to make it the biggest number?

### Choices

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

a. | 9 | |

b. | 5 | |

c. | 8 | |

d. | 0 |