# Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 6): Questions 59 - 64 of 268

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## Question number: 59

» Mental Ability » Basic Arithmetic

### Question

Hiral think of a number then she subtract 5 from it and multiply the answer by 4. Let the resulting number be X. Starting with X, how can she get the original number back?

### Choices

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

a. | Multiply X by 5 and then subtract 4 from the result | |

b. | Divide X by 4 and then add 5 to the result | |

c. | Divide X by 4 and then subtract 5 from the result | |

d. | Multiply X by 4 and then add 5 to the result |

## Question number: 60

» Mental Ability » Basic Arithmetic

### Question

The number that should replace the triangle so that the following forms a proportion is________.

23, 56, 42, ∆

### Choices

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

a. | 105 | |

b. | 100 | |

c. | 102 | |

d. | 104 |

## Question number: 61

» Mental Ability » Basic Arithmetic

### Question

is equivalent to ________.

### Choices

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

a. | 50% | |

b. | 30% | |

c. | 25% | |

d. | 75% |

## Question number: 62

» Mental Ability » Basic Arithmetic

### Question

I think of a number, add 10 to it and divide the answer by 2. Let the resulting number be X. Starting with X, how can I get my original number back?

### Choices

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

a. | Add 2 to X and then divide the resulting number by 10 | |

b. | Multiply X by 2 and then add 10 to the result | |

c. | Divide X by 2 and then add 10 to the result | |

d. | Multiply X by 2 and then subtract 10 from the result |

## Question number: 63

» Mental Ability » Basic Arithmetic

### Question

How many numbers from 45 to 86 divisible by 9?

### Choices

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

a. | 5 | |

b. | 3 | |

c. | 4 | |

d. | 7 |

## Question number: 64

» Mental Ability » Basic Arithmetic

### Question

If all the numbers from 12 to 110 which are divisible by 12 are arranged in descending order then which number will be at 8 ^{th} place?

### Choices

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

a. | 84 | |

b. | 24 | |

c. | 12 | |

d. | 96 |