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Demographic transition theory of population was proposed by c blacker.
The ratio of age of A and his son is 5:2. If the difference of their ages 4 year ago is 21, then find the sum of ages of A and his son 9 year hence?
When 16 years ago age of Ram was divided by 24, the present age of his granddaughter Surbhi is obtained. If Surbhi is 3 years younger than...
The ratio of age of A and his son is 9:2. If the difference of their ages 7 year ago is 21, then find the sum of ages of A and his son 13 year hence?
The current age ratio of 'A' to 'B' is 5:7, and their combined age is 48 years. The age of 'A', after 'n' years, will equal the age of 'B' from 'n' year...
Amit age after 20 years will be 4 times his age 4 years back. What is the present age of Amit?
Present ages of P and Q are in the ratio 2:5 respectively. If Q’s age, 15 years hence from now will be 5 times of P’s age, 5 years ago from now, the...
The ratio of the present ages of father and his son is 9:5. The product of their ages 3 years ago was 33 times of his son’s age that year. What was so...
‘A’ is 8 years younger than ‘B’ and 6 years elder than ‘C’. If the present age of ‘B’ and ‘D’ is 30 years and 20 years, respectively...
P's present age is 30% less than what her husband's age will be 8 years from now. If 3 years ago, the sum of their ages was 37 ye...
Sum of the present ages of A, B, C and D is 54 years. After 4 years ratio of their ages is 5:4:3:2. What is C’s present age?
