6 | A farmer has some hens and cows. If the number of heads be 48 and the number of feet equals 140, then the number of hens will be? | |

22 | ||

23 | ||

24 | ||

26 |

Let the number of hens be x and the number of cows be y.

Then, x + y = 48 ..... (i)

and 2x + 4y = 140

x + 2y = 70 ..... (ii)

Solving (i) and (ii) we get:

x = 26, y = 22.

The required answer = 26.

7 | N number of persons decided to raise Rs. 3 lakhs by equal contributions from each. Had they contributed Rs. 50 each extra, the contribution would have been Rs. 3.25 lakhs. How many persons are they? | |

400 | ||

500 | ||

450 | ||

None on the above |

N x 50 = (325000 – 300000) = 25000

So, N=500.

8 | Kiran has 85 currency notes in all, some of which were of Rs. 100 denomination and the remaining of Rs. 50 denomination. The total amount of all these currency notes was Rs. 5000. How much amount did she have in the denomination of Rs. 50? | |

1900 | ||

3500 | ||

4000 | ||

None on the above |

Let the number of 50 rupee notes be x.

Then, the number of 100 rupee notes = (85 – x)

50x + 100(85 – x) = 5000

==> x + 2 (85 – x) = 100 ==> x=70

So, required amount = Rs. (50 x 70) = Rs. 3500

9 | A Worker may claim Rs. 1.50 for each km which he travels by taxi and 50 p for each km he drives his own car. If in one week he claimed Rs. 50 for travelling 80 km, how many kms did he travel by taxi? | |

42 | ||

40 | ||

35 | ||

38 |

Let the number of correct answers be X.

Number of incorrect answers = (60 – X).

4x – (60 – x) = 130

=> 5x = 190

=> x = 38

10 | In an examination, a student scores 4 marks for every correct answer and loses I mark for every wrong answer. If he attempts in all 60 questions and secures 130 marks, the number of questions he attempts correctly, is: | |

35 | ||

38 | ||

40 | ||

42 |

Let the number of correct answers be X.

Number of incorrect answers = (60 – X).

4x – (60 – x) = 130

=> 5x = 190 ==> x = 38