Question : Find the mean proportional between 25 and 225.

Option 1: 65

Option 2: 25

Option 3: 75

Option 4: 85

Question : What is the ratio of the mean proportional between 1.6 and 3.6 and the third proportional of 5 and 8?

Option 1: 2 : 15

Option 2: 5 : 16

Option 3: 3 : 16

Option 4: 4 : 15

Question : Find the fourth proportional to the numbers 24,192, and 27.

Option 1: 216

Option 2: 108

Option 3: 162

Option 4: 170.67

Question : The approximate amount of silica present in cement is:

Option 1: between 27% and 35%

Option 2: between 37% and 45%

Option 3: between 17% and 25%

Option 4: between 47% and 55%

Question : If the LCM and the HCF of two numbers are 12 and 2 respectively, then find the mean proportional of these numbers.

Option 1: $2 \sqrt{6}$

Option 2: $\sqrt{14}$

Option 3: $2$

Option 4: $\sqrt{6}$