In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 60 questions and secures 130 marks, the no of questions he attempts correctly is :

A) 35 | B) 38 |

C) 40 | D) 42 |

Explanation:

Let the number of correct answers be X.

Number of incorrect answers = (60 – X).

4x – (60 – x) = 130

=> 5x = 190

=> x = 38

view answer Workspace Report Error Discuss

Subject: Simplification - Quantitative Aptitude - Arithmetic Ability

A fires 5 shots to B's 3 but A kills only once in 3 shots while B kills once in 2 shots. When B has missed 27 times, A has killed :

A) 30 birds | B) 60 birds |

C) 72 birds | D) 90 birds |

Explanation:

Let the no of shots be x. Then,

Shots fired by A =

Shots fired by B =

Killing shots by A = =

shots missed by B = =

Birds killed by A =

view answer Workspace Report Error Discuss

Subject: Simplification - Quantitative Aptitude - Arithmetic Ability

If 2 tables and 3 chairs cost Rs, 3500 and 3 tables and 2 chairs cost Rs. 4000, then how much does a table cost ?

A) 500 | B) 1000 |

C) 1500 | D) 2000 |

Explanation:

Let the cost of a table and that of a chair be Rs. x and Rs, y respectively.

Then, 2x + 3y = 3500 ...(i)

and 3x + 2y = 4000 .....(ii)

solving (i) and (ii) we get x = 1000, y = 500

view answer Workspace Report Error Discuss

Subject: Simplification - Quantitative Aptitude - Arithmetic Ability

In a regular week, there are 5 working days and for each day, the working hours are 8. A man gets Rs. 2.40 per hour for regular work and Rs. 3.20 per hours for overtime. If he earns Rs. 432 in 4 weeks, then how many hours does he work for ?

A) 160 | B) 175 |

C) 180 | D) 195 |

Explanation:

Suppose the man works overtime for *x* hours.

Now, working hours in 4 weeks = (5 x 8 x 4) = 160.

160 x 2.40 + *x* x 3.20 = 432

=> 3.20*x* = 432 - 384 = 48

=> *x* = 15.

Hence, total hours of work = (160 + 15) = 175.

view answer Workspace Report Error Discuss

Subject: Simplification - Quantitative Aptitude - Arithmetic Ability

To fill a tank, 25 buckets of water is required. How many buckets of water will be required to fill the same tank if the capacity of bucket is reduced to two-fifth of its present ?

A) 52.5 | B) 62.5 |

C) 72.5 | D) 82.5 |

Explanation:

Let the capacity of 1 bucket = x.

Then, capacity of tank = 25x.

New capacity of bucket = .

Required no of buckets = = 62.5

view answer Workspace Report Error Discuss

Subject: Simplification - Quantitative Aptitude - Arithmetic Ability