The arithmetic mean of the series 1, 2, 4, 8, 16

The arithmetic mean of the series 1, 2, 4, 8, 16, . . . . . . , $2^{n}$ is. A. $\Large\frac{2^{n}-1}{n+1}$ B. $\Large\frac{2^{n}+1}{n}$ C. $\Large\frac{2^{n}-1}{n}$ D. $\Large\frac{2^{n+1}-1}{n+1}$ Answer: Option…

A, B, C and D are four consecutive even numbers

A, B, C and D are four consecutive even numbers respectively and their average is 65. What is the product of A and D? A. 3968 B. 4092 C. 4216…

The average of two numbers is 6.5 and square root..

The average of two numbers is 6.5 and square root of their product is 6. What are the numbers? A. 11 and 2 B. 8 and 5 C. 9 and…

The average of five consecutive odd numbers is 95.

The average of five consecutive odd numbers is 95. What is the fourth number in the descending order? A. 91 B. 95 C. 97 D. None of these Answer: Option…

The sum of the three consecutive even numbers is 44..

The sum of the three consecutive even numbers is 44 more than the average of these numbers. Which of the following is the third largest of these numbers? A. 16…