What is the present age of Ravindra if15 years from now his age will be 4 times his present age the correct equation is?

After fifteen years, Ravi’s age = 4x years. Fifteen years from now, Ravi’s age = (x+15) years. x = 5 years. Hence, Ravi’s present age be 5 years.

What is Ravi’s present age the present age of Ravi is half of that of his father?

Discussion :: Problems on Ages – Data Sufficiency 2 (Q. No. 2)

What is Ravi’s present age?
I.	The present age of Ravi is half of that of his father.
II.	After 5 years, the ratio of Ravi’s age to that of his father’s age will be 6 : 11.
III.	Ravi is 5 years younger than his brother.

What is Ravi present age?

What is Ravi’s present age? ∴ Ravi’s present age = 5 years.

What is Ravi’s present age?

What is Ravi’s present age I the present age of Ravi is half of that of his father II after 5 years the ratio of Ravi’s age to that of his father’s age will be 6 11?

x = 25. Thus, Ravi’s present age = 25 years.

What is meant by consistent equations?

In mathematics and particularly in algebra, a linear or nonlinear system of equations is called consistent if there is at least one set of values for the unknowns that satisfies each equation in the system—that is, when substituted into each of the equations, they make each equation hold true as an identity.

When a number is reduced by 5 it becomes 80\% of itself find the number?

Answer: The number is 25.

What is Arun’s present age five years ago Arun’s age was double?

5 years ago, Arun’s age = 2 x His son’s age. Clearly, any two of the above will give Arun’s present age. Correct answer is (D).

Which one is not a linear equation in one variable?

Answer: 2. 33 (x + y)=4 is not linear equation in one variable.

What is consistent and independent?

If a system has at least one solution, it is said to be consistent . If a consistent system has exactly one solution, it is independent . If a consistent system has an infinite number of solutions, it is dependent . If a system has no solution, it is said to be inconsistent .