# NSO Level 1- Science Olympiad (SOF) Class 7: Questions 131 - 136 of 597

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## Question number: 131

### Question

A letter lock consists of four rings each marked with eight different letters. The number of distinct unsuccessful attempts to open the lock is at the most?

### Choices

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

a. | 2046 | |

b. | 4095 | |

c. | 4096 | |

d. | 2048 |

## Question number: 132

### Question

Find the missing number in the given series.

### Choices

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

a. | 174 | |

b. | 171 | |

c. | 156 | |

d. | 168 |

## Question number: 133

### Question

The given pattern contains three set of numbers around circles. All the circles are numbered except one. Find the missing number.

### Choices

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

a. | 222 | |

b. | 42 | |

c. | 32 | |

d. | 142 |

## Question number: 134

### Question

The sum of two numbers is 25 and their difference is 21. Find their product.

### Choices

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

a. | 44 | |

b. | 13 | |

c. | 46 | |

d. | 38 |

## Question number: 135

### Question

There are 4 bags, in 1^{st} there are 8 apples, in 2^{nd} 10 bananas, in 3^{rd} 7 oranges and in 4^{th} 5 cherries. There are how many ways you can buy one fruit if all the apples are identical, all the bananas are identical, all the oranges are identical, and also all the cherries are identical?

### Choices

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

a. | 28 | |

b. | 25 | |

c. | 32 | |

d. | 30 |

## Question number: 136

### Question

Three train tickets from city M to N and two tickets from city M to O cost Rs. 56 but one tickets from city M to N and two tickets from city M to O cost Rs. 44. What are the fares for cities N and O from M?

### Choices

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

a. | Rs. 5, Rs. 23 | |

b. | Rs. 6, Rs. 17 | |

c. | Rs. 13, Rs. 17 | |

d. | Rs. 10, Rs. 15 |