31:

Which of the following is true?

A. | √2+√5=√7 |

B. | √2+√5 ≤ √7 |

C. | √2+√5<√7 |

D. | √2+√5 > √7 |

(√2+√5)² = 2 + 2√10 +5 =7+2√10 |

32:

What is the least number which on being divided by 5, 6, 8, 9, 12 leaves in each case a remainder 1 but when divided by 13 leaves no remainder?

A. | 2987 |

B. | 3601 |

C. | 3600 |

D. | 2986 |

L.C.M. of 5, 6, 8, 9 and 12 is 360 |

33:

Average marks of 15 students in a class is 145, maximum marks being 150. If two lowest scores are removed, the average increases by 5. Also, two lowest scores are consecutive multiples of 9. What is lowest score in the.class?

A. | 126 |

B. | 117 |

C. | 108 |

D. | None of these |

Total marks of 15 students = 15 x 145 = 2175. |

34:

A gardener had a number of shrubs to plant in horizontal rows. At first he tried to plant 5 shrubs in each row, then 6, then 8 and then 12, but had always 1 left. On trying 13, in one row he had none left. What is the smallest number of shrubs that he could have had?

A. | 481 |

B. | 477 |

C. | 468 |

D. | 121 |

Number is 120K + 1= ((13 * 9 + 3) K + 1) |

35:

Average age of a team of 15 employees is 36. Youngest of them is 20 years old and eldest is 56 years old. Two of them with average age 28 leave the team. If one of the two comes back on the condition that he will be made the team leader, then which of the following can possibly be average age of the new team so formed?

A. | 35 |

B. | 36 |

C. | 38 |

D. | 39 |

Total age = 15 x 36 |

Copyright © 2015 Avatto.com