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question_answer1) Find the mean proportional of\[~8(a+b)\] and \[18(a+b).\]
question_answer2) Compounded ratio of \[(x+y):(x-y),\text{ (}{{x}^{2}}+{{y}^{2}}):{{(x+y)}^{2}}\]and \[({{x}^{2}}-{{y}^{2}}):({{x}^{4}}-{{y}^{4}})\] is:
question_answer3) If b is mean proportion between a and c, then \[\frac{{{a}^{2}}-{{b}^{2}}+{{c}^{2}}}{{{a}^{-2}}-{{b}^{-2}}+{{c}^{-2}}}\] is equal to:
question_answer4) The monthly income of \[x\]and \[y\] are in the ratio of 4 : 5 and their monthly expenditure are in the ratio 7 : 9. If both save $ 100 per month then monthly expenditure of \[x\] will be:
question_answer5) Find the number which is to be subtracted from each of the number 23, 40, 57 and 108 so that the remainder are in proportion.
question_answer6) A person buys some pen and pencil from the market at a rate such that a pencil is twice as costly as pen. He sells them such that the cost of pencil is thrice the cost of pen. By selling a pen at twice of its cost price, he makes 150 % profit on the whole. Find the ratio of pencils to pen.
question_answer7) A and B started a business investing $ 85000 and $ 15000 respectively. Find the ratio of profit or loss divided between A and B after 15 years.
question_answer8) In a container, water and milk are mixed in the ratio 5: 3. If 16 litres of mixture are removed and same quantity of milk be added then the ratio becomes 3: 5. What is the volume of the container?
question_answer9) The ratio of ages of Marry and Mariya is 4: 5. After 12 years their ratio becomes 5: 6. What will be the age of Marry after 2 years?
question_answer10) For every 14 apple that Peter buys 4 turn out to be rotten. At this rate, how many rotten apple will Peter have if he buys 105 apples?
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