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175 men can dig a canal of 3150 meters long in 36 days. How many men are required to dig a canal of 3900 meters long in 24 days? |

A) 325 B) 350 C) 375 D) 400 Correct Answer : 325 Explanation :175 men*36 days / X men*24 days = 3150 meters/3900 meters So, 325 men are required. |

A bag contains red, blue and black balls. The ratio of red to blue balls is 3 : 5. The ratio of black to red balls is 3 : 4. What is the ratio of blue to black balls? |

A) 5 : 3
B) 4 : 5
C) 9 : 20
D) 20 : 9
Correct Answer : 20 : 9 Explanation :ratio of red to blue balls= red / blue = 3 / 5 ratio of black to blue balls= (black / red) * (red / blue) Hence, ratio of blue to black balls = 1 /(9/20) = 20/9 |

2/7 of the stamps in Ravi's stamp collection are Indian stamps and the remaining are foreign stamps. What is the ratio of Indian stamps to foreign stamps in Ravi's stamp collection? |

A) 2 : 5 B) 5 : 7 C) 5 : 2 D) 7 : 5 Correct Answer : 2 : 5 Explanation :Total 7 stamps 2 are Indian stamps the ratio of Indian stamps to Foreign stamps in Ravi’s collection= 2/5 |

A certain sum was divided among A, B and C in the ratio 5 : 7 : 6. If B received Rs 4500 more than C, find C's share? |

A) 30,000 B) 27,000 C) 25,000 D) 23,000 Correct Answer : 27,000 Explanation :Let the amount received by A, B, c be 5x, 7x and 6x respectively. 7x-6x = 4500 C's share = 6x = 6*4500 = 27000 |

Rs 750 are divided among A, B and C in such a manner that A : B = 5 : 2 and B : C = 7 : 13, What is A’s share? |

A) Rs 250
B) Rs 300
C) Rs 350
D) Rs 400
Correct Answer : Rs 350 Explanation :Given ratio : Solving for A : B : C A’s share, 35x = 35*10 = Rs 350 |

An alloy contains copper and zinc in the ratio 5 : 3 and another contains copper and tin in the ratio 8 : 5, If equal weights of the two are melted together to form a 3 rd alloy, find the weight of tin per kg in the new alloy? |

A) 40/129
B) 5/13
C) 5/26
D) 28/5
Correct Answer : 5/26 Explanation :
weight of copper in X kg of 1st alloy = X* 5/5+3 = 5X/8 kg both alloy melted together, so total weight= X + X = 2X |