Question : Directions: If $\sqrt{AFI}\ :\ 13\ ::\ \sqrt{DDA}\ :\ ?$
Option 1: 12
Option 2: 22
Option 3: 21
Option 4: 24
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Correct Answer: 21
Solution :
Given:
If $\sqrt{AFI}\ :\ 13\ ::\ \sqrt{DDA}\ :\ ?$
The position values of A, F, and I are 1, 6, and 9 respectively.
On combining the place values, we get 169.
Now, $\sqrt{169}\ =\ 13$
Thus, $\sqrt{AFI}$ is coded as 13.
Similarly, follow the same pattern for $\sqrt{DDA}\ :\ ?$ –
The position values of D, D and A are 4, 4 and 1 respectively.
On combining the place values, we get 441.
Now, $\sqrt{441}\ =\ 21$
Thus, $\sqrt{DDA}$ is coded as 21. Hence, the third option is correct.
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