# NCO- Cyber Olympiad (SOF) Class 8: Questions 136 - 139 of 510

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## Question number: 136

» Mental Ability » Number Games

### Question

Statement 1: The cube of a number is that number raised to the power of 3.

Statement 2: The natural number n is a perfect cube if for some natural number m.

Statement 3: The cube of an even natural number is even.

Statement 4: The cube of an odd natural number is odd.

State whether the above statements are correct or incorrect?

### Choices

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

a. | Statements 1,2 and 3 are incorrect | |

b. | Only statements 1 and 3 are correct | |

c. | Statements 2,3 and 4 are incorrect | |

d. | All statements are correct |

## Question number: 137

» Mental Ability » Basic Arithmetic

### Question

The monthly salaries of A, B, C are in the proportion 5: 3: 8. If C’s monthly salary is Rs. 800 more than that of A, then B’s annual salary is

### Choices

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

a. | Rs. 12000 | |

b. | Rs. 4000 | |

c. | Rs. 10200 | |

d. | Rs. 9600 |

## Question number: 138

» Mental Ability » Basic Statistics

### Question

A man goes to a place at the rate of 8 kmph. He comes back on a bicycle at 12 kmph. His average speed for the entire journey is:

### Choices

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

a. | 5.4 kmph | |

b. | 10 kmph | |

c. | 4.8 kmph | |

d. | 5 kmph |

## Question number: 139

» Non Verbal Reasoning » Paper Folding

### Question

In the following question, a paper of the given geometrical shape is folded and punched as shown. How will the paper look when unfolded? Select your answer from the answer figures given below.

### Choices

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

a. | ||

b. | ||

c. | ||

d. |