Ratio and Proportion Aptitude Questions

51. Find the mean proportional of 81 and 36?

1. 56
2. 55
3. 54
4. 52

52. Find the mean proportional of 1.6 and 3.6?

1. 2.4
2. 36
3. 9
4. 6

53. Find the mean proportional of $3+\sqrt{2}$ and $12-\sqrt{32}$?

1. $\sqrt{7}$
2. $2\sqrt{7}$
3. $\sqrt{5}$
4. $2\sqrt{5}$

54. Find the mean proportional of $3+\sqrt{2}$ and $12-\sqrt{32}$?

1. $\sqrt{7}$
2. $2\sqrt{7}$
3. $\sqrt{5}$
4. $2\sqrt{5}$

55. Find the mean proportional of two numbers 1 and $a^2+2ab+b^2$?

1. a+b
2. a-b
3. 2
4. 1.5