# Basic Mathematics-Arithmetic (KVPY Stream-SA (Class 11) Math): Questions 21 - 25 of 77

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## Question number: 21

» Basic Mathematics » Arithmetic » Rates

Appeared in Year: 2012

### Question

A train leaves Pune at 7: 30 am and reaches Mumbai at 11: 30 am. Another train leaves Mumbai at 9: 30 am and reaches Pune at 1: 00 pm. Assuming that the two trains travel at constant speeds, at what time do the two trains cross each other?

### Choices

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

a. | 11: 30 am | |

b. | 10: 26 am | |

c. | data not sufficient | |

d. | 10: 20 am |

## Question number: 22

» Basic Mathematics » Arithmetic » Ratio and Proportion

Appeared in Year: 2014

### Question

In a cinema hall, the charge per person is Rs. 200. On the first day, only 60 % of the seats were filled. The owner decided to reduce the price by 20 % and there was an increase of 50 % in the number of spectators on the next day. The percentage increase in the revenue on the second day was

### Choices

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

a. | 20 | |

b. | 50 | |

c. | 30 | |

d. | 40 |

## Question number: 23

» Basic Mathematics » Arithmetic » Number Games

### Question

How many distinct primes is dividing 21! + 22! + 23! ?

### Choices

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

a. | 12 | |

b. | 9 | |

c. | 5 | |

d. | 7 |

## Question number: 24

» Basic Mathematics » Arithmetic » Absolute Value

### Question

The least positive integer n from which is,

### Choices

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

a. | 7 | |

b. | 8 | |

c. | 9 | |

d. | 6 |

## Question number: 25

» Basic Mathematics » Arithmetic » Ratio and Proportion

### Question

The average incomes of the people in two villages are P and Q, respectively. Assume that P ≠ Q. A person moves from the first village to the second village. The new average incomes are P’ and Q’, respectively. Which of the following is not possible?

### Choices

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

a. | P’ > P and Q’ < Q | |

b. | P’ > P and Q’ > Q | |

c. | P’ = P and Q’ = Q | |

d. | P’ < P and Q’ < Q |