For the following questions answer them individually
The average of the 3-digit numbers 372, 2$$x$$5 and $$x$$37 is 498. What is the average of $$\left(2x + 7\right)$$ and $$\left(5x - 2\right)$$?
The height of A is 20% more than of B, and the height of B is 20% less than that of C. The height of C is 30% more than that of D. If the difference between the heights of C and A is 6.8 cm, then what is the height (in cm) of B?
X can do a certain work in 40 hours. Y is 25% more efficient than X, and Z is 28% more efficient than Y. Working together, X. Y and Z will complete the same work in:
When 5054,5906 and 7397 are divided by the greatest number $$x$$ , the remainder in each case is the same. The sum of the digits of $$x$$ is:
What is the mean of the mode and median of the given data?
5, 4, 6, 9, 3, 2, 5, 6, 7, 8, 9, 5, 7, 3
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