QuotePad 2.0.2; 10/15/2015 5:18:25 PM*******************************************************************===================================================================List 1 (11 notes)===================================================================[10/15/2015 5:05:28 PM]Honestly, in my opinion, I shouldnt be writing this article at this stage. Who amI to tell you how to study? I havent cleared Mains yet, and have no authority totell others how to strategize. But, I do believe in an egalitarian society anddespise distorted competition. The whole concept of Insights is to help each other out(aam aadmi) and threaten these coaching centers. But, in this article, I shall not list out books, nor tell you what to study. There are enough posts in this website and in many others to discuss about them. This is more about strategies and addressing motivational needs.[10/15/2015 5:07:20 PM]Ten years ago, P was half of Q s age. If the ratio of their present ages is 3:4,what will be the total of their present ages?A. 45B. 40C. 35D. 30Hide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option CExplanation :Let the present age of P and Q be 3x and 4x respectively.Ten years ago, P was half of Q s age=> (3x 10) = 12(4x 10)=> 6x 20 = 4x 10=> 2x = 10=> x = 5total of their present ages = 3x + 4x = 7x = 7 5 = 35[10/15/2015 5:07:49 PM]Father is aged three times more than his son Sunil. After 8 years, he would be two and a half times of Sunil s age. After further 8 years, how many times wouldhe be of Sunil s age?A. 4 timesB. 4 timesC. 2 timesD. 3 timesHide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option CExplanation :Assume that Sunil s present age = x.Then father s present age = 3x + x = 4xAfter 8 years, father s age = 212 times of Sunils age=> (4x+8) = 212(x+8)=> 4x + 8 = 52(x + 8)=> 8x + 16 = 5x + 40=> 3x = 40 - 16 = 24=> x = 243 = 8After further 8 years,Sunil s age = x + 8 + 8 = 8 + 8 + 8 = 24Father s age = 4x + 8 + 8 = 4 8 + 8 + 8 = 48Father s age/Sunil s age = 4824 = 2[10/15/2015 5:10:28 PM]======================================================================DiscussionBoardHow many ways can we arrange the letter TOKYO withi) the O together[10/15/2015 5:12:39 PM]How many ways can we arrange the letter TOKYO withi) the O togetherii) the O separated[10/15/2015 5:12:50 PM]Speed Mathematics OverviewMultiplication using Speed MathematicsCube Roots of Perfect Cubes using Speed MathematicsSquare of a Number using Speed Mathematics[10/15/2015 5:12:57 PM]Karthik read 7/13 th of a book in 1st week and 5/9 th of the remaining book in 2nd week. If there were 96pages unread after 2nd week, how many pages were there in the book ?1)2)3)4)5)518452468502396[10/15/2015 5:13:29 PM]the option which is a multiple of 9 and 13 will be the answer and i think this is the fastest method to solve this question[10/15/2015 5:14:54 PM]2nd week- 5/9(6/13)= 10/39remaining- 6/13-10/39=8/39as given 8/39=96 =>468[10/15/2015 5:14:58 PM]2nd week- 5/9(6/13)= 10/39remaining- 6/13-10/39=8/39as given 8/39=96 =>468[10/15/2015 5:18:09 PM]search careerbless.comProgrammingQuantitative AptitudeSpeed MathematicsScientific CalculatorMiscellaneousHome > Quantitative Aptitude > Quantitative aptitude questions and answers...> Problems on Ages > Solved ExamplesSolved Examples1. Ten years ago, P was half of Q s age. If the ratio of their present ages is 3:4, what will be the total of their present ages?A. 45B. 40C. 35D. 30Hide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option CExplanation :Let the present age of P and Q be 3x and 4x respectively.Ten years ago, P was half of Q s age=> (3x 10) = 12(4x 10)=> 6x 20 = 4x 10=> 2x = 10=> x = 5total of their present ages = 3x + 4x = 7x = 7 5 = 352. Father is aged three times more than his son Sunil. After 8 years, he would be two and a half times of Sunil s age. After further 8 years, how many times would he be of Sunil s age?A. 4 timesB. 4 timesC. 2 timesD. 3 timesHide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option CExplanation :Assume that Sunil s present age = x.Then father s present age = 3x + x = 4xAfter 8 years, father s age = 212 times of Sunils age=> (4x+8) = 212(x+8)=> 4x + 8 = 52(x + 8)=> 8x + 16 = 5x + 40=> 3x = 40 - 16 = 24=> x = 243 = 8After further 8 years,Sunil s age = x + 8 + 8 = 8 + 8 + 8 = 24Father s age = 4x + 8 + 8 = 4 8 + 8 + 8 = 48Father s age/Sunil s age = 4824 = 23. A man s age is 125% of what it was 10 years ago, but 8313% of what it will beafter 10 years. What is his present age?A. 70B. 60C. 50D. 40Hide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option CExplanation :Let the age before 10 years = xThen 125x100 = x + 10=>125x = 100x + 1000=> x = 100025 = 40Present age = x + 10 = 40 +10 = 504. A man is 24 years older than his son. In two years, his age will be twice theage of his son. What is the present age of his son?A. 23 yearsB. 22 yearsC. 21 yearsD. 20 yearsHide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option BExplanation :Let the present age of the son = x yearsThen present age the man = (x+24) yearsGiven that in 2 years, man s age will be twice the age of his son=> (x+24) +2 = 2(x+2)=> x = 225. Present ages of Kiran and Syam are in the ratio of 5 : 4 respectively. Threeyears hence, the ratio of their ages will become 11 : 9 respectively. What is Syam s present age in years?A. 28B. 27C. 26D. 24Hide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option DExplanation :Ratio of the present age of Kiran and Syam = 5 : 4Let the present age of Kiran = 5xPresent age of Syam = 4xAfter 3 years, ratio of their ages = 11:9=> (5x + 3) : (4x + 3) = 11 : 9=> 9(5x + 3) = 11(4x + 3)=> 45x + 27 = 44x + 33=> x = 33-27 =6Syam s present age = 4x = 46 = 246. The sum of ages of 5 children born at the intervals of 3 years each is 50 years. Find out the age of the youngest child?A. 6 yearsB. 5 yearsC. 4 yearsD. 3 yearsHide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option CExplanation :Let the age of the youngest child = xThen the ages of 5 children can be written as x, (x+3), (x+6),(x+9) and (x+12)x + (x+3) + (x+6) + (x+9) + (x+12) = 50=> 5x + 30 = 50=> 5x = 20=> x = 205 = 47. A is two years older than B who is twice as old as C. The total of the ages of A, B and C is 27. How old is B?A. 10B. 9C. 8D. 7View Answer|Notebook| Discuss8. The average age of a class of 22 students is 21 years. The average increasedby 1 when the teacher s age also included. What is the age of the teacher?A. 48B. 45C. 43D. 44Hide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option DExplanation :Total age of all students = 2221Total age of all students + age of the teacher = 23 22Age of the teacher = 2322 2221 = 22(23-21) = 222 = 449. A father said to his son, "I was as old as you are at the present at the timeof your birth". If the father s age is 38 years now, what was the son s age five years back?A. 20 yearsB. 18 yearsC. 14 yearsD. 22 yearsView Answer|Notebook| Discuss10. Ayisha s age is 1/6th of her father s age. Ayisha s father s age will be twice the age of Shankar s age after 10 years. If Shankar s eight birthdays was celebrated two years before, then what is Ayisha s present age.A. 10 yearsB. 12 yearsC. 8 yearsD. 5 yearsHide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option DExplanation :Consider Ayisha s present age = xThen her father s age = 6xGiven that Ayisha s father s age will be twice the age of Shankar s age after 10 years=> Shankar s age after 10 years = 12(6x + 10) = 3x + 5Also given that Shankar s eight birthdays was celebrated two years before=> Shankar s age after 10 years = 8 + 12 = 20=> 3x + 5 = 20=> x = 153 = 5Therefore, Ayisha s present age = 5 years11. The sum of the present ages of a son and his father is 60 years. Six years ago, father s age was five times the age of the son. After 6 years, what will beson s age?A. 23 yearsB. 22 yearsC. 21 yearsD. 20 yearsView Answer|Notebook| Discuss12. Kiarn is younger than Bineesh by 7 years and their ages are in the respective ratio of 7 : 9, how old is Kiran?A. 25B. 24.5C. 24D. 23.5Hide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option BExplanation :Let the ages of Kiran and Bineesh are 7x and 9x respectively7x = 9x - 7=> x = 72 = 3.5Kiran s age = 7x = 7 3.5 = 24.513. Six years ago, the ratio of the ages of Vimal and Saroj was 6 : 5. Four years hence, the ratio of their ages will be 11 : 10. What is Saroj s age at present?A. 18B. 17C. 16D. 15View Answer|Notebook| Discuss14. At present, the ratio between the ages of Shekhar and Shobha is 4 : 3. After6 years, Shekhar s age will be 26 years. Find out the age of Shobha at present?A. 15 yearsB. 14 yearsC. 13 yearsD. 12 yearsHide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option AExplanation :After 6 years, Shekhar s age will be 26 years=> Present age of Shekhar = 26 6 = 20Let present age of Shobha = xThen20x=43x = 2034=1515. My brother is 3 years elder to me. My father was 28 years of age when my sister was born while my mother was 26 years of age when I was born. If my sister was 4 years of age when my brother was born, then what was the age my father whenmy brother was born?A. 35 yearsB. 34 yearsC. 33 yearsD. 32 yearsView Answer|Notebook| Discuss16. The present ages of A,B and C are in proportions 4 : 7 : 9. Eight years ago,the sum of their ages was 56. What are their present ages (in years)?A. Insufficient dataB. 16, 30, 40C. 16, 28 40D. 16, 28, 36Hide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option DExplanation :Let s take the present age of A,B and C as 4x, 7x and 9x respectively(4x - 8) + (7x 8) + (9x 8) = 56=> 20x = 80=> x = 4Hence the present age of A, B and C are 44, 74 and 94 respectivelyie, 16,28 and 36 respectively.17. A person s present age is two-fifth of the age of his mother. After 8 years,he will be one-half of the age of his mother. What is the present age of the mother?A. 60B. 50C. 40D. 30Hide Answer|Notebook| DiscussHere is the answer and explanationAnswer : Option CExplanation :Let the present age of t