Ratio of simple interest for 6 years and 9 years at same rate is ____. A. 1 : 3 B. 1: 4 C. 2 : 3 D. Cannot be determined Explanation: SI ∝ time.
Ratio of simple interest to compound interest for same sum at 8% for 3 years is ____. A. 1875/2029 B. 1/2.5 C. 1903/2156 D. 4/9 Explanation: Use SI = PRT/100 and the CI formula.
Faheem earns 80,000, Imran 70,000 and Naveed 50,000. What is the ratio of their salaries ____. A. 80:70:60 B. 8:7:5 C. 4:7:5 D. 7:8:5 Explanation: Divide all by 10,000.
What is the ratio of perimeters of two squares if one side is 3 times the other ____. A. 4: 8 B. 1: 4 C. 6: 2 D. 3: 1 Explanation: Perimeter ∝ side.
Entry fee is Rs. 15, Rs. 7.50 and Rs. 2.50 for 3 days. What is the average fee ____. A. Rs. 3 B. Rs. 4.50 C. Rs. 5.00 D. Rs. 7.50 Explanation: Average = (15+7.5+2.5)/3.
Vessel P contains 62.5% alcohol, and Q contains 87.5%. If 2 L from P and 4 L from Q are mixed, find ratio of alcohol to water ____. A. 16: 5 B. 14: 5 C. 16: 7 D. 19: 5 Explanation: Calculate the alcohol content and compare it with water.
Wheat costing Rs. 9/kg and Rs. 15/kg are mixed in ratio 3: 7. What is the cost price per kg of mixture ____. A. Rs. 13.50 B. Rs. 14.50 C. Rs. 15.50 D. Rs. 16.50 Explanation: Weighted average = (3×9+7×15)/10.
Two numbers are respectively 20% and 50% more than a third number. What is their ratio ____. A. 2: 5 B. 3: 5 C. 4: 5 D. 6: 7 Explanation: 1.2x: 1.5x = 4: 5.
Two numbers are in the ratio 5: 4 and their difference is 10. What is the larger number ____. A. 40 B. 50 C. 60 D. 30 Explanation: Difference = x → x=10 → numbers = 5x,4x.
Two numbers are in the ratio 3: 5. If 9 is subtracted from each, the new numbers are in the ratio 1: 2. What is the larger number ____. A. 27 B. 33 C. 49 D. 55 Explanation: Let numbers 3x and 5x → solve (3x−9)/(5x−9)=1/2.