Find the mean proportional between 9 and 16

Find the mean proportional between 48 and 12.

Find two rational numbers between 3 and 4 by mean method.

Find the measure of angle between the asymptotes of x^(2) -y^(2) = 16

If n arithmetic means are inserted between 20 and 80. Such that the ratio of first mean to the last mean is 1: 3 , then find the value of n.

Find the rational numbers between (2)/( 9) and ( 2)/( 7) .

Find any five rational numbers between 2 and 3 using mean method.

Find an irrational number between (5)/(7) and (7)/(9) . How many more there may be?

Find the mean deviation about the mean for the following data: 12,3,18,17,4,9,17,19,20,15,8,17,2,3,16,11,3,1,0,5 .

Find the mean deviation about the mean for the data : 4,7,8,9,10,12,13,17

Find the mean deviation about the median for the data : 13,17,16,14,11,13,10,16,11,18,12,17