Question

In the following question, there are two terms to the left of the sign :: which are related in some way. Obtain the same relationship between the term to the right of the sign :: and from one of the four alternatives given under it.

$531:81::642:?$

• A. $91$
• B. $111$
• C. $144$
• D. $196$

Answer 1

Answer: (C)

$144$

In the first group, $5+3+1=9.$
Now, $9^2=81$
Similarly, in the second group, 6 + 4 + 2 = 12.
Now, ${12}^2=144$
Hence, option (C) is the correct answer.