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Sunday 3 July 2011

Maths - Problems on Ages

                                                     Exersice

1. Rajiv's age after 15 years will be 5 times his age 5 years back. What is the present age of Rajeev?
              a. 5 b. 10 c. 15 d. 20
2. The ages of two persons differ by 16 years. If 6 years ago the elder one be 3 times as ols as the younger one, find their persent ages?
                     a. 14, 30 b. 14, 14 c. 30, 30 d. 14, 15
3. The product of the ages of Ankit and Niketa is 240. if twice the age of Niketa is more than Ankit's age by 4 years, Niketa's age is:
                   a. 10 b. 12 c. 14 d. 16
4. Rohit was 4 times as old as his son 8 years ago. After 8 years, Rohit will be twice as old as his son. Rohit's present age is:
                     a. 20 b. 30 c. 40 d. 50
5. One year ago, the ratio of Gaurav's and Sachin's age was 6:7 respectivaly. Four year hence, the ratio will be 7:8. Sachin's age is:
                     a. 33 b. 34 c. 35 d. 36
6. Sachin is younger than Rahul by 7 years. If their ages are in the respective ratio of 7:9, how old is Sachin/
                      a. 16 b. 18 c. Cant find d. None
7. Hitesh is 40 years old and Ronnie is 60 years old. How many years ago was the ratio of their ages 3:5?
                       a. 5 b. 10 c. 20 d. 37
8. A is two year older than B who is twice as old as C. If the total of the ages of A, B & C is 27 year. Age of B is;
                        a. 7 b. 8 c. 9 d. 10
9. A person's present age is two-fifth of the age of his mother. Afetr 8 years, he will be one-half of the age of his mother. Mother's present age?
                       a. 32 b. 36 c. 40 d. 48
10. Q is as much younger than R as he is older than T. If the sum of the ages of R & T is 50. Than diffrence of ages of R and Q is:
                      a. 1 b. 2 c. Cant find d. None
11. The sum of the ages of 5 children born at the intervals of 3 years is 50 years. What is the age of the youngest one?
                         a. 4 b. 8 c. 10 d. None
Direction: Give ans (a) if data in I is sufficient to answer the Q, not II, give (b) if data in II is sufficient to answer the Q, not I, give (c) if data in either statement is sufficient to answer the Q, give (d) if data in both is not sufficient to answer the Q, give (e) if both needed to answer the Q.
12. The sum of the ages of P, Q & R is 96 years. The age of Q is:
               I) P is 6 years older than R. II) The total of the ages of Q & P is 56.
13. How old is C.
              I) 3 yrs ago average of A & B was 18 yrs. II) With joining C them now average becomes 22 yrs.
14. Divya is twice as old as Shruti. What is the diffrence of their ages?
            I) 5 yrs hence, the ratio of their ages will be 9:5. II) 10 yrs back, the ratio of their ages was 3:1.
Answers: 1b, 2a, 3b, 4c, 5d, 6d, 7d, 8d, 9c, 10c, 11a, 12e, 13e, 14c,

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