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a = 128, r = 1/2 5th term = 128 × [1/2]5 - 1 ⇒ 128 × [1/2]4 ⇒ 128 × 1/16 ⇒ 8 ∴ The 5th term in progress ion is 8.
There are three persons 'Amit', 'Bhuvan' and 'Cheetan' such that 7 times the present age of 'Amit' is equal to 9 times the present age of 'Bhuvan' while...
A is 4 years older than B while C is 5 years younger than B. The ratio of age of A, 7 years hence and age of B, 6 years ago is 3:2. What was age of C, 1...
At present, Naveen is six years younger than Mohit. Mohit’s age fifteen years hence will be equal to thrice that of Naveen three years ago. What w...
Currently, the ages of Vikesh and Vishal are in a ratio of 7:5. Vijay's age is 20% lower than Vishal's. If the average age of Vikesh, Vishal, and Vijay ...
The current ages of Raman and Raghav are in the ratio of 5:4. In six years, their ages will have a ratio of 11:9. What was the ratio of their ages ten y...
Reena is twice as old as Sunita .Three years ago, she was three times as old as Sunita. How old is Reena now?
The ratio of the present ages of P and Q is 8:5 respectively. If the age of P 10 years hence from now will be 100% more than the age of Q 4 years ago fr...
The ratio of the present age of A to that of B is 7:9. Six years ago the ratio of 1/3 of A’s age at that time and 1/3 of B’s age at that time was 1:...
In three years, the age of person P will be 60% of person Q's age. Currently, person Q is 60% older than person R. Seven years ago, R was 13 years old. ...
The average age of Rohit’s parents is 42 years. The ratio of his father and mother’s age is 4 : 3 respectively. Find his mother’s age?
