Question : Find the third proportional to 23 and 31.

Option 1: $\frac{31}{23}$

Option 2: $\frac{961}{23}$

Option 3: $\frac{23}{31}$

Option 4: $\frac{23}{961}$

Question : The ratio of the third proportional to 16 & 40 and the mean proportional between 10 & 40 is:

Option 1: 5 : 1

Option 2: 1 : 5

Option 3: 4 : 1

Option 4: 1 : 4

Question : $\sqrt{\frac{5}{4}×\frac{64}{125}×1.44}$ is equal to:

Option 1: $\frac{26}{25}$

Option 2: $\frac{24}{25}$

Option 3: $\frac{23}{25}$

Option 4: $\frac{21}{25}$

Question : $\sqrt{1\frac{1}{4}×\frac{64}{125}×1.44}$ is equal to:

Option 1: $\frac{1}{25}$

Option 2: $\frac{24}{25}$

Option 3: $\frac{23}{25}$

Option 4: $\frac{21}{25}$

Question : Directions: Select the related letter/number from the given alternatives.
N x M : 14 x 13 : : X x Z : ?

Option 1: 24 x 23

Option 2: 23 x 24

Option 3: 24 x 26

Option 4: 26 x 23