View in English View in Hindi |

In a bag, there are notes of 10, 20 and 50 in the ratio of 1 : 2 : 3. If the total money is 1000, how many notes of 10 are there? |

A) 5
B) 10
C) 15
D) 30
Correct Answer :5 Explanation :Let the number of 10, 20 and 50 notes be X, 2X and 3X, respectively. Then , |

If A = B*(2/3) and B = C *(4/5), then what will be A: B: C ? |

A) 12:8:10
B) 15:10:8
C) 10:15:12
D) 8:12:15
Correct Answer :8:12:15 Explanation :A = B*(2/3) => A/B = 2/3 |

If the annual income of A, B and C is in the ratio of 1: 3: 7 and the total annual income of A and C is 800000, then what is the monthly salary of B? |

A) 20000
B) 25000
C) 30000
D) 15000
Correct Answer :25000 Explanation :Let the monthly salary of A, B and C are X, 3X and 7X, then X+7x=800000 |

An examination of a school, the ratio of successful and unsuccessful candidates is 6: 1. If 6 more candidates are successful,then the ratio would be 9: 1 . What is the total number of candidates? |

A) 140
B) 120
C) 200
D) 160
Correct Answer :140 Explanation :Let the successful candidates is 6X and unsuccessful candidates is X , then Therefore, 6X+6 / X - 6 = 9/1 |

The ratio between the two numbers is 4: 5. If 4 is increased in each numbers , then the ratio becomes 3: 5. What is the greater number? |

A) 36
B) 48
C) 56
D) 64
Correct Answer :56 Explanation :Let the numbers is 4X and 7X , then |

The ratio of two student numbers P and Q is 2: 5. If P's number is 120, then what is the Q's number? |

A) 120
B) 240
C) 300
D) 360
Correct Answer :300 Explanation :Let the P's number is 2X and Q's number is 5X , then |

In a class of 49 students, the ratio of girls to boys is 4 : 3. If 4 girls leave the class, the ratio of girls to boys would be? |

A) 11 : 7 B) 8 : 7 C) 6 : 5 D) 9 : 8 Correct Answer :8 : 7 Explanation :Let the number of girls be 4x and boys be 3x. So,number of girls, 4x = 4*7 = 28 and number of boys, 3x = 3*7 = 21 Now 4 girls leave thus number of girls = 28 - 4 = 24 |

The respective ratio betwen the monthly salary of Om and that of Pihu is 7 : 9. Om and Pihu, both save 20% and 40% out of their respective monhtly salary. Om invest 1/2 of his savings in PPF and Pihu invests 7/9 of his savings in PPF. If Om and Pihu together saved 17500 in PPF, what is Pihu’s monthly salary? |

A) 72000 B) 36000 C) 45000 D) 40000 Correct Answer :45000 Explanation :Let,Om and Pihu monthly salary be7x Om’s investement in PPF=7x/5 * 1/2 =7x/10 Now, according to the question, |

By increasing the price of entry ticket to a fair in the ratio 3 : 7, the number of visitors to the fair has decreased in the ratio 16 : 13. In what ratio has the total collection increased or decreased? |

A) decreased in the ratio 91 : 48 B) increased in the ratio 48 : 91 C) increased in the ratio 39 : 112 D) decreased in the ratio 112 : 39 Correct Answer :increased in the ratio 48 : 91 Explanation :Total collection = Price of each entry ticket * number of visitors |

If 2x=3y and 4y=5z, then what is x:z=? |

A) 3:4 B) 4:3 C) 15:8 D) 8:15 Correct Answer :15:8 Explanation :2x = 3y => x=3y/2 4y = 5z => z= 4y/5 Hence, x:z = (3y/2) : (4y/5) = 15:8 |

What quantity must be added to each term of the ratio a + b : a – b to make it equal to (a + b) |

A) (a+b)/2a B) (b-1)/2a C) (b D) (a + b)/ (a – b) Correct Answer :(b Explanation :Let the X is quantity , then - |

In a school 4/9 of the pupils are boys. There are 125 girls. How many boys are there? |

A) 80 B) 100 C) 110 D) 120 Correct Answer :100 Explanation :Let total people be x So,number of girls = 1 - 4/9 = 5x/9 So number of boys = 4x/9 = 4/9 *225 = 100 |

If A:B = 3:4 and B:C = 5:6, find A:C? |

A) 5:9 B) 3:4 C) 1:2 D) 5:8 Correct Answer :5:8 Explanation :As is given B/C = 5/6 |

IF X:Y = 3:4 AND Y:Z = 4:5, FIND X:Y:Z? |

A) 2 : 3 : 4 B) 3 : 4 : 5 C) 4 : 5 : 6 D) 5 : 6 : 7 Correct Answer :3 : 4 : 5 Explanation :Given, X:Y = 3:4 Now, Y:Z = 4 : 5 So, X : Y : Z = 3Y / 4 : Y : 5Y / 4 Or X : Y = 3 : 4 = 3*4:4*4 = 12/16 Therefore the ratio X:Y:Z = 12:16:20 = 3:4:5 |

If A:B = 2:3 and B:C = 9:5 find A:B:C? |

A) 2 : 3 : 4 B) 6: 9 : 5 C) 4 : 5 : 6 D) 5 : 6 : 7 Correct Answer :6: 9 : 5 Explanation :Given, A:B = 2:3 Now, B:C = 9:5 So, A:B:C = 2B/3 : B : 5B/9 Or A:B = 2:3 = 2*9:3*9 = 18/27 Therefore the ratio A:B:C = 18 : 27 : 15 = 6:9:5 |

If A:B = 3/5:5/7 and B:C = 3/4:2/5, find A:B:C? |

A) 63:75:40 B) 65:75:80 C) 60:50:40 D) 60:70:80 Correct Answer :63:75:40 Explanation :A:B = 3/5:5/7 = 3*7:5*5 = 21 : 25 Therefore for the ratio A:B:C A:B = 21*15:25*15 |